Boo

Appearing in both films

James P. Sullivan

James Patrick "Sulley" Sullivan is a furry, cyan-and-purple-spotted monster with a humanoid bear face, short devilish horns, dark blue eyebrows, and a cat-like nose. He has muscular limbs, a reptilian tail, dorsal spikes, and feline fangs. He excels at scaring children but is genial and sweet-natured.

Monsters University depicts a younger Sulley as a gifted but arrogant student, whose father Bill had made a name for himself as a scarer. While attempting to capture a school pet, he meets Mike Wazowski. What begins as a rivalry between the two monsters becomes a friendship that endures after they both got disgracefully expelled from the school.

In Monsters, Inc., he is named the best scarer at the company, and following the events of the film, he leads the company's restructuring of utilizing laughs instead of screams to harvest energy. By the end of the film, he and Mike are named the company's joint chief executive officers.

In Monsters at Work, he retains the title.

Mike Wazowski

Mike Wazowski (voiced by Billy Crystal in the film series, shorts, and the Disney+ series, Carlos Alazraqui in the video games, merchandise, attractions, and commercials and Noah Johnston as his younger self) is a green one-eyed monster with a round body, two small horns, and thin arms. He has four fingers on each hand and three toes on each foot. Wazowski is depicted as diligent and intelligent, but also competitive, wise-cracking and stubborn.

During a childhood field trip to the energy company Monsters, Inc., Wazowski becomes inspired to become a professional scarer. He gets accepted into the Monsters University scare program years later, where he meets both James P. "Sulley" Sullivan and Randall Boggs. Wazowski grows jealousy towards Sulley for his cocky personality and slacker attitude, but expresses a liking for Boggs, his roommate. After failing one of the classes in the scaring program, Wazowski works out a deal with the Dean to re-enroll in the program on the stipulation that he wins the Scare Games, a competitive series of scare-based challenges. To participate, he joins the unpopular fraternity Oozma Kappa, which is later joined by Sulley, who also failed the class. Sulley and Wazowski begin to form a friendship as they compete in the games. During the final event, Sulley cheats on Wazowski's behalf. Distraught, Wazowski breaks into a door-lab to enter the human world in an attempt to find out if human children find him scary, which they do not.

Although Sulley rescues him, this incident results in both Sulley and Wazowski's expulsion from the school. The two apply as workers in the Monsters, Inc. mailroom. They advance through the ranks until Sulley becomes a scarer with Wazowski as his assistant.

In Monsters, Inc., Sulley and Wazowski operate a station on the titular factory's Scare Floor, where they successfully generate energy with Sulley's scaring ability. Wazowski is in a romantic relationship with Celia Mae at this time. Throughout the film, Wazowski helps Sulley in his newfound mission to rescue Boo, a human child who sneaks into the factory.

While Sulley bonds with Boo, Wazowski is initially more inclined to find any means of getting rid of her. Meanwhile, Boggs, who is no longer on good terms with either of them, is concocting a plot to generate more energy using the Scream Extractor, a machine that requires the kidnapping of human children. Amidst the chaos resulting from Boo's unknown presence, he discovers that Wazowski knows information about her, and they both agree to return her to a designated location. Upon arriving there, mentioning Boggs' involvement makes Sulley hesitant, and while trying to disprove his suspicion, Wazowski gets abducted by Boggs and uncover of his plan. Following several further plot events, Sulley and Wazowski successfully return Boo home, expel Boggs to the human world, and prove the orchestration of the scheme by Mr. Waternoose, the company's CEO, to Child Detection Agency (CDA) Agents.

Randall Boggs

Randall Boggs is a purple, eight-legged, reptilian monster who can change his skin color to blend in with his surroundings. He is Sulley's arch-rival and Mike's nemesis and former close friend.

In the prequel Monsters University, Randall enrolls at the same time as Mike and the two end up as friends and roommates. He is neurotic and timid at first, having difficulty controlling his camouflage abilities, but is a model bookworm. When Randall is accepted into Roar Omega Roar, the top fraternity in the university, he quickly abandons Mike in order to retain his standing with the fraternity. He becomes more confident, determined, and vicious. After an embarrassing loss to Sulley at the Scare Games, a furious Randall vows he will never be beaten by Sulley again.

In Monsters, Inc., he vies for the position as the area's top scream collector, a competition set up to encourage working. Randall and his assistant Jeff Fungus collaborate with Waternoose to save the company by kidnapping human children to solve the crisis and allow Randall to rise to a higher position, but also secretly planning to betray Waternoose and take over the company. Sometime after Randall had finished building the Scream Extractor, Randall leaves a door activated on the Scare Floor, and a human child (later named Boo) wanders out. After discovering that she is in the factory and learning that Sulley and Mike were involved, he makes a deal with Mike: he will bring Boo's door to his station during lunch, where they will be able to return Boo, but he secretly hides in Boo's room waiting to capture her. When a suspicious Sulley refuses to trust Randall's plan, Mike goes into the room instead to prove Sulley wrong, leading Randall to abduct Mike by mistake. He nevertheless decides to use Mike as a test subject for the machine, but Sulley rescues him and Fungus is put in front of the machine instead and is disfigured as a result. He is soon revealed to have Waternoose as his partner, who banishes Sulley and Mike to the Himalayas to ensure that they cannot interfere with their plan and expose it to the public. Before Randall could extract the scream from Boo, Sulley returns and destroys the machine (using it to pin Waternoose, Randall, and Fungus to the wall, but Randall was quick enough to dodge it), thus saving Boo. Randall attempts to stop Sulley's escape but is heroically thwarted by Mike. After a long chase through the doors in the factory's door storage facility, Boo eventually conquers her fear of Randall and stops him from pushing Sulley out of an open door, buying Sulley enough time to overpower him. Afterward, Randall is forcibly exiled to the human world and winds up in a mobile home where the inhabitants beat him senseless, thinking he is an alligator. Sulley and Mike then destroy the door to prevent Randall's return. Later, Waternoose is exposed and arrested for his crimes, while Fungus learns from his mistakes and forms a working relationship with Mike and Sulley.

Roz

Roz (voiced by Bob Peterson) is a snail-like monster who is the key master and administrator of Scare Floor F. Near the end of the film, she is revealed to be Number One of the CDA Agents, having been on an undercover assignment to investigate the company and expose Randall and Waternoose's scheme. She appears briefly near the end of the prequel as a member of the CDA Agents squad that responds to the break-in at the Door Lab, although she wears a full-body protective suit that covers her face. She reappears in the first episode of Monsters at Work, informing Mike and Sulley that the board of directors were putting them in charge of Monsters, Inc. and that her old undercover job was being given to her sister Roze. It is revealed in the season finale that she also works for the Monstropolis Energy Regulatory Commission.

CDA Agents

CDA Agents are an assortment of different monsters in hazmat suits (variously voiced by Rodger Bumpass, Pete Docter, Bill Farmer, Teddy Newton, David Silverman, and Lee Unkrich) whose main job is to respond to any reported incidents of contact between monsters and children or their belongings, since it is believed that human objects are toxic. They isolate and destroy any items accidentally brought back into the monster world. Any monsters that come in contact with a human object are quickly and forcibly decontaminated and get a neck cone applied afterwards.

Yeti

The Yeti (voiced by John Ratzenberger) is a white-furred monster from Monstropolis who got banished to the Himalayas in the human world. He is a friendly monster and an expert at making snow cones. The Abominable Snowman greets Sulley and Mike when Mr. Waternoose banish them to the Himalayas. While the Abominable Snowman tries to make Sulley and Mike feel at home in his abode, he understands Sulley must rescue Boo, and tells him of a Nepalese village at the foot of the mountain where they can regain access to the monster world. Despite everything, the Abominable Snowman seems to have made the most of his fate and genuinely seems to enjoy the human world.

In the end credits in Cars (2006), the Abominable Snowplow, based on him, makes a cameo appearance.

In Monsters University, he was shown to have worked as a mailroom supervisor at Monsters, Inc. He warns Mike and Sulley not to tamper with the mail which is a crime punishable by banishment.

In Monsters at Work, it is revealed that he was banished by Mr. Waternoose after stumbling across a letter detailing the Scream Extractor plot. Due to this Sulley invites him back to monsters inc and agrees. Once that was done, the Abominable Snowman happily works as a snow cone salesman at Monsters, Inc. under the new name of Adorable.

Appearing in Monsters, Inc.

Boo

Boo (voiced by Mary Gibbs) is a three-year-old human girl who encounters Sulley and Mike after inadvertently entering the world of monsters. Boo is initially believed to be toxic to the monsters, but Sulley and Mike quickly learn otherwise. After learning of Boo's presence, Randall tries to kidnap Boo by making a deal with Mike, but due to Sulley and Boo not trusting Randall's motive, he kidnaps Mike by mistake; Sulley later rescues him. Boo may not be afraid of Sulley, but when she was brought into the training room (which is a simulator where scare recruits do their training) after Mike and Sulley escaped from Randall, she ended up frightened by Sulley's roar. When Mike and Sulley tried to return Boo to her home, Waternoose had Mike and Sulley exiled to the Himalayas to keep them from causing further interference with his malevolent plan. Sulley returns to the factory and rescues Boo from Randall's Scream Extractor (a large machine that is capable of extracting and collecting a child's scream), destroying the machine in the process. During the chase through the large storage vault, Boo's laughter ends up causing all the doors to operate. Eventually, Boo gets over being afraid of Randall and helps to defeat him. Sulley and Mike are able to access Boo's door, but Waternoose and the CDA Agents send it back to the Scare Floor. Mike distracts the CDA Agents carrying what they think is Boo, while Sulley escapes with Boo and her door, although Mr. Waternoose follows after they accidentally get his attention. Waternoose is arrested after his plot is exposed; the CDA Agents's undercover leader is revealed to be Roz, and she allows Sulley and Mike five minutes to return Boo to her world. Once Sulley and Mike have returned Boo to her room, her door is put through the shredder to ensure her safety. Boo tries to see Sulley again, but only finds her ordinary closet behind her door. Sometime later, Mike rebuilds Boo's door, allowing Sulley to reunite with her.

Monsters, Inc. employees

Henry J. Waternoose III (voiced by James Coburn) is a spider-like monster with five eyes, seven claws on each hand, six crab-like legs, who wears a business suit. He is the former company president and the CEO of Monsters, Inc. The company has been in Waternoose's family for three generations as he had inherited the company from his father at the age of 142. Amidst an energy crisis, Waternoose plans to save the company by kidnapping human children to extract their screams with Randall's help. At this point, Waternoose exiles Sulley and Mike to the Himalayas to keep them from interfering with his plan any further, though he later regrets it since they were his top employees. Sulley and Mike manage to escape the human world and trick Waternoose into exposing his plan to the CDA agents, resulting in his arrest. Sulley is appointed as Waternoose's successor.

In Monsters University, Waternoose makes a cameo on an image where he shakes hands with Sulley and Mike, who are being promoted as scare team members. Waternoose also cameos in the first episode of Monsters at Work, where his image appears during the outdated orientation video. The Xenon processor, a CPU used in the Xbox 360, was codenamed "Waternoose" after the character.

In Monsters at Work, the arrest of Waternoose was mentioned frequently. By the end of the second season, it is stated that Johnny Worthington had been imprisoned with Waternoose.

Celia Mae is a pink cyclops gorgon-like monster with purple snakes for hair, tentacles for legs, who wears a slick sleeveless green dress, with a gill-print design and a blueish green furry collar. She works as a receptionist at Monsters, Inc. and is Mike Wazowski's girlfriend. When Mike is on a date with Celia at Harryhausen's, a Japanese sushi restaurant, to honor her birthday, a little child made herself known as the CDA Agents raid the place and use a device that caused an energy dome that engulfed Harryhausen's. Celia was among the monsters who were decontaminated at that time, which then forces her and her snakes hairs to wear neck cones after enduring the decontamination, much to her embarrassment; Mike did try to help her, but was stopped by Sulley. As a result, Celia is now angry at Mike and she confronts him the next day, and she unintentionally slips Mike's involvement in the incident the previous night while scolding him, which Randall discovers. When Mike and Sulley were being chased by Randall, Celia grabbed onto Mike, threatening to break up with him if he did not tell her what was happening; though Mike stated that they are trying to get Boo back to her room, Celia did not believe him at first until Boo appeared over Sulley's shoulder, startling her into letting go of Mike. Celia, having calmed down a bit, does a diversion by announcing that Randall had broken the Scare Record. She is seen again at the end of the film, having fully recovered and reconciled with Mike, and tells him that a box full of magazines has just arrived. Both she and Mike are surprised to see that Mike has made the cover of the magazine. Despite not appearing in Monsters University, Celia is seen in a photo in Mike's locker room, where he puts up a new photo of himself and Sulley on their first day as a Scarer Team, next to Celia's near the end of the movie.

Tony

Tony (voiced by Guido Quaroni) is a tall, slender orange monster with a moustache, four tentacles for arms and five shorter tentacles for legs. He is a grocer that works at Tony's Grossery and was first seen telling Mike and Sulley that somebody is about to break the All-Scare Record and throws them blood oranges while wishing them the best of luck.

Ted

Ted is the largest monster in the movie; he is so big, only his elephant-like legs, covered with large, coarse brown scales, are shown at all. He mainly communicates using chicken sounds, yet he roars in one baseball-themed short featuring him. He is shown at a crossroads waiting for the light to change with Mike and Sulley. Sulley says "good morning" up at him, he crows back, then the light turns green, and Ted stomps across the road, causing an earthquake with every step. Mike is not happy with Sulley after the encounter since Sulley points out, ignoring Ted's size, that Ted was walking to work. His point being that they should too, only to be responded to by Mike who is frustrated since he wanted to drive his red sports car.

Other characters

Baby Smitty – (voiced by Joe's daughter Sophia Ranft) An infant slug-like monster who attends daycare and bites Mike Wazowski's hand, who is credited under the film's "Additional Voices".

Appearing in Monsters University

University staff

Abigail Hardscrabble (voiced by Helen Mirren) is the strict dean of Monsters University. She is a red, dragon-like monster with centipede-like legs and red bat wings. When Hardscrabble attended Monsters University in her youth, she was a member of the Eta Hiss Hiss sorority and is the founder and a four-time consecutive champion of the Scare Games.

Professor Derek Knight (voiced by Alfred Molina) is a dinosaur-like monster who teaches SCARING 101: Intro to Scaring at the School of Scaring. He often weeds out the least worthy students so that the best of the best can move on to becoming Scarers. Professor Knight is also shown to be a fan of Bill Sullivan, Sulley's father. When he is first seen during the exam that would determine who will take part in the School of Scaring, Dean Abigail Hardscrabble "assists" him where she weeds out Mike for not being scary and Sulley for doing an incorrect scare

Professor Knight is later seen in the opening of the first episode of Monsters at Work, overseeing Tylor's exam. He appears again in the first episode of the series' second season, introducing the Scream Kings and Queens of Monsters University during MU's homecoming football game halftime show.

Professor William Brandywine is a round monster with yellow fur whose eyes are invisible. He works at Monsters University's School of Engineering where he teaches Scream Canister Designs to his students. Don Carlton's character model was used to make Professor Brandywine.

The Librarian (voiced by Marcia Wallace) is an elderly female monster who works at the library at Monsters University. She is a large slug-headed teacher with six monstrous tentacles for legs and gray hair. The Librarian is involved in the "Avoid the Parent" challenge of the Scare Games where the Librarian's reaction to noise is made to emulate the danger of parents and how a Scarer has to get along without being caught by one. Any team who is caught by the Librarian is thrown out of the library and eliminated from the competition, which was the case for Slugma Slugma Kappa. The Oozma Kappa bypass her with the help of vocal distractions after Sulley accidentally alerts her by toppling a ladder.

Ed (voiced by Philip Proctor) is a janitor at Monsters University.

Oozma Kappa students

Oozma Kappa (OΚ) is one of the six fraternities at Monsters University. It is mostly filled with good-natured misfits. Besides the protagonists Mike and Sulley, among the members of Oozma Kappa are:

Don Carlton (voiced by Joel Murray) is a reddish-purple-skinned, mature monster with a bat-shaped mustache and octopus-like tentacles for arms who returned to Monsters University to learn how to use computers and maybe consider trying for scaring. He is the President of Oozma Kappa. Don later got engaged to Scott "Squishy" Squibbles' mother Sherri. During the credits, it is shown that Don had gotten a job as a scarer at Monsters, Inc. under the moniker "Dangerous Don Carlton".

Art (voiced by Charlie Day) is a purple furry monster with an arch shape and a questionable background (in a scene he revealed that he was in jail before). It is shown during the credits that he got a job as a scarer at Monsters, Inc.

Scott "Squishy" Squibbles (voiced by Peter Sohn) is a five-eyed, pink-skinned jelly monster whose mother owns the fraternity house. It is shown during the credits that he got a job as a scarer at Monsters, Inc., under the moniker 'Scott "Scary" Squibbles'.

Terri (voiced by Sean Hayes) and Terry Perry (voiced by Dave Foley) are a two-headed orange monster with one eye on each head, four arms, and tentacles for legs. Terri's head has one horn while Terry's head has two horns. Terri, a dance major, is the naively optimistic one of the two while Terry, an English major, is more morose but has a fondness for close-up magic. They are very different personality wise but they work well together as shown in the Scare Games. It is shown during the credits that they got a job as a scarer at Monsters, Inc., under the moniker "Terrifying Terry and Terri Perry".

Roar Omega Roar students

Roar Omega Roar (RΩR) is one of the six fraternities at Monsters University. It is made up of the best of the best as they are the smartest, most-skilled, and scariest monsters at Monsters University. Besides Randall, among the members of Roar Omega Roar are:

Johnny J. "The Jaw" Worthington III (voiced by Nathan Fillion) is the confident President of Roar Omega Roar who is a big bully to Mike Wazowski and Oozma Kappa as well is the rest of the RORs. He competes against Mike in the last round of the Scare Games. During the credits, it is shown that Johnny got a job as a Scarer at Fear Co. By season two of Monsters at Work, he is now the company's CEO, and it is also revealed that his father founded the company. One of the things he has done was returned Randall Boggs to Monstropolis. By the season two finale, Johnny and Randall are arrested when their crimes were exposed.

Chet "The Claw" Alexander (voiced by Bobby Moynihan) is a one-eyed crab-like monster who is the vice president of Roar Omega Roar. During the credits, it is shown that Chet got a job as a scarer at Fear Co. He competes against Terri and Terry in the final round of the Scare Games. He returns in Monsters at Work in the second season as a MERC agent working undercover as Johnny's assistant.

Chip Goff is a purple monster with two horns and large fangs. He is the only member of the fraternity (Sulley not included) to wear a fraternity letterman jacket: the rest of the fraternity wear cardigans or letter sweaters in accordance with their "elite" image. He competes against Squishy in the final round of the Scare Games.

"Howling" Javier Rios is an insect-like monster with four arms and pink eyes. He competes against Art in the final round of the Scare Games. During the credits, it is shown that he got a job as a scarer at Monsters, Inc.

Reggie "Bruiser" Jacobs is a dark green monster with three eyes and grass-like hair all over his body. He competes against Don Carlton in the first wave, final round of the Scare Games during the scare simulator and loses to him. Johnny tells Reggie to "take an easy on Grandpa!" So after Don Carlton wins, he sarcastically tells Reggie "Thanks for taking it easy on Grandpa!" while smiling.

Python Nu Kappa students

Python Nu Kappa (PΝΚ) is one of the six sororities at Monsters University. The female students here - aside from being near identical to each other with minor color differences - are smart, frozen-hearted, and merciless. Every time they get announced or tell Oozma Kappa they're "going to rip them to pieces", they all hiss and their eyes glow even in the dark. In the Scare Games, Python Nu Kappa was eliminated after they got lost in the maze and accidentally scared teenagers during the "Don't Scare the Teen" event. According to the "Monsters University Essential Guide", all of the members of Python Nu Kappa want to work at a crematorium. Among the members of Python Nu Kappa are:

Carrie Williams (voiced by Beth Behrs) is a three-eyed pink monster with red hair who is the fearless President of Python Nu Kappa. During the credits, it is shown that Carrie got a job as a scarer at Scream Industries (although the Scare Card picture shown is actually that of Britney Davis, a differently colored member of the sorority).

Jaws Theta Chi students

Jaws Theta Chi (JΘΧ) is one of the six fraternities at Monsters University. The students here are big on brawn and small on brainpower. In the Scare Games, Jaws Theta Chi was disqualified for using a protective gel that would prevent them from painful swelling upon coming in contact with the "child's toys" (glowing sea urchins) during the "Toxicity Challenge" event. Besides George Sanderson, among the members of Jaws Theta Chi are:

Roy "Big Red" O'Growlahan (voiced by John Cygan) is a big red monster with eye stalks who is the President of Jaws Theta Chi. He competed with Chris J. Hicks (an Omega Howl student) to get Sulley into their group. He later appears during the third episode of Monsters at Work.

Dirk Pratt is a yellow furry monster with sharp teeth and a mace at the end of his tail.

Omar Harris is a small bean-like monster with six legs and bat-like wings. During the credits, it is shown that he got a job at Scream Industries.

Percy Boleslaw is a one-eyed purple monster with horns.

Baboso Goretega is a blue slug-like monster who appears in promotional material for the film. He is never seen in the final film (except for a minor appearance in a Fear Tech jacket).

Slugma Slugma Kappa students

Slugma Slugma Kappa (ΣΣΚ) is one of the six Sororities at Monsters University. The students here spend most of their days working out and running drills to perfect their scaring skills. In the Scare Games, Slugma Slugma Kappa was eliminated after they were caught by the Librarian during the "Avoid the Parent" event and thrown out thanks to a distraction from Oozma Kappa. Among the members of Slugma Slugma Kappa are:

Carla Delgado is a pink monster with tentacles for arms and legs who is the President of Slugma Slugma Kappa. According to the "Monsters University Essential Guide", she is an ace swimmer.

Brynn Larson is a purple three-eyed bean-shaped monster who can run fast.

Debbie Gabler is a turquoise monster with turquoise hair. She has one eyestalk on top of her hair.

Donna Soohoo is a purple snake-like monster with hair all over her head that is covering her face. During the credits, she gets a job at Monsters, Inc.

Maria Garcia is an orange monster with parted hair covering one eye.

Violet Steslick is a one-eyed purple monster with brown twisted horns.

Eta Hiss Hiss students

Eta Hiss Hiss (ΗSS) is one of the six Sororities at Monsters University. The students here have a goth and emo style. This was the sorority that Dean Hardscrabble was a part of when she attended Monsters University. In the Scare Games, Eta Hiss Hiss was eliminated after they did not find good hiding places in the "Hide and Sneak" event where they were caught by the referee. According to the "Monsters University Fearbook" and the "Monsters University Extensive Guide", the members of Eta Hiss Hiss are an award-winning A Cappella group. Among the members of Eta Hiss Hiss are:

Rosie Levin is a big greenish grey monster with glasses who is the president of Eta Hiss Hiss. Monsters at Work reveals she started working at Monsters, Inc. as a comedy student.

Nadia Petrov is a three-eyed pink bean-shaped monster with purple hair. She is interested in books.

Sonia Lewis is a snail like-blue monster with blackish blue hair.

Susan Jensen is a tall monster with pink hair.

Rhonda Boyd is a one-eyed snail like-monster.

Nancy Kim is a short one-eyed monster.

Brock Pearson

Brock Pearson (voiced by Tyler Labine) is a massive purple bird-like monster with two horns on his head and sharp claws on his hands. He is the vice-president of the Greek Council. Brock and Claire commentate on the Scare Games.

Claire Wheeler

Claire Wheeler (voiced by Aubrey Plaza) is a three-eyed grey monster who is a member of the Greek Council. She and Brock commentate on the Scare Games. Claire was credited as "Greek Council President". In Monsters at Work, she works at Fear Co. and is married to CEO Johnny Worthington III with 2 children.

Slug Student

The Slug Student (voiced by Bill Hader) is a snail-like student of Monsters University. When school starts, the Slug Student slithers to get to his class. By the time he gets to his classroom in the post-credits scene, he learns from Ed the janitor that the school year is over and returns home.

He later appears in the fourth episode of Monsters at Work.

Sherry Squibbles

Ms. Sherry Squibbles (voiced by Julia Sweeney) is a monster who is the mother of Scott Squibbles. She also owns the Oozma Kappa fraternity house. By the end of the film, Sherry gets engaged to Don Carlton. She is also a Metalhead as proven in one scene where she listens to Metal music in her van.

Ms. Karen Graves

Ms. Karen Graves (voiced by Bonnie Hunt) is a pink snail-like monster that was Mike's grade school teacher.

"Frightening" Frank McCay

"Frightening" Frank McCay (voiced by John Krasinski) is a superstar Scarer who inspires Mike to want to be a Scarer. He is a tall, light blue monster with retractable claws, numerous spikes on his head, and five tentacles as legs.

Archie

Archie is the mascot of Fear Tech (a rival school of Monsters University) that Sulley steals, He is an orange scare pig with six legs and goat-like horns on his head. Mike later catches Archie by tipping over a trash can and trapping him. The other students gave Sulley the credit for catching Archie much to the dismay of Mike.

The Smile Squad

The Smile Squad is the team that helped Mike get registered for his first day and give him information about Monsters University. All of their names rhyme with "ay". Among the members are:

Jay is a pink monster with two eyes on his head and tentacles for hands and legs. He contacts incoming students and directs them to the registration hall.

Kay is a yellow bean-shaped monster with three eyes. She works at the registration table.

Trey is a blue snail-like monster. He is in charge of taking the photo for a student's I.D. card.

Fay is a blue monster with blue hair, two eyes on top of her head and tentacles for arms and legs. She gives new students an orientation tour of the university's facilities.

Ray is blue monster with two eyes on his head. He is stationed at the dormitories and assigns new students their room.

Monsters, Inc. Professional Scarers

During Mike's childhood, his class encountered various Scarers in their field trip to Monsters, Inc.. Besides Frank McCay, among the famous Scarers are:

"Jumping" Jerry Jablonski is a light green monster who is a recolored version of Rivera.

"Screaming" Bob Gunderson is a shaggy red muskox-like monster with curly horns, bushy eyebrows that conceal his eyes completely, and a large mustache.

Betty Stevenson is a red one-eyed monster with two large cow-like horns.

Carl Johnson is a purple one-eyed monster with a single horn on his head.

Carla "Killer Claws" Benitez (voiced by Alanna Ubach in Monsters at Work) is a tall yellow monster with long purple claws who was seen during Oozma Kappa's "field trip" to Monsters, Inc.. She later appears in Monsters at Work as a comedy student and later promoted to jokester.

Carol Dallmar is a yellow monster who is a recolored version of Ricky Plesuski.

Clive Carver is a light blue monster who is a recolored version of Augustus "Spike" Jones.

Darryl Payne is a green monster with long, thin arms and legs, three eyes, and sharp spikes covering his body.

Dorothy "The Pink Widow" Newbern is a pink pompom spider-like monster.

Earl "The Terror" Thompson is a blue monster with four eyes and a dark blue mustache resembling a tarantula. He was a famous scarer working at Monsters, Inc., who had a particularly long career, continuing to scare at old age.

Appearing in Monsters at Work

Tylor Tuskmon

Tylor Tuskmon (voiced by Ben Feldman) is a recent graduate of Monsters University. He was accepted into Monsters, Inc. the same day Waternoose was outed as CEO and the company switched energy sources from screaming to laughter. He transferred to the maintenance team, Monsters, Inc. Facilities Team (MIFT), while training as a comedy student. When Monsters, Inc. changed its policy from scaring to joking following Waternoose's arrest, Tylor was uncomfortable with the transition. He is promoted to a full-time Jokester in the season 1 finale. In season 2, he enters a crossroads when Johnny Worthington offers him a job at Fear Co. In the end, he remains a Jokester and is now part of a comedy duo with his best friend Val Little.

Val Little

Val Little (voiced by Mindy Kaling) is a mechanic at MIFT, and Tylor's best friend. Val was briefly in the same class as Tylor at Monsters University before she dropped out. After college, she spent a year on an island, then enlisted at MIFT as a mechanic. She becomes Tylor's Jokester assistant. In Season 2, she discovers and follows a talent at being a Jokester and eventually becomes one and shortly later as Monsters, Inc. first comedy duo with Tylor.

Mr. Crummyham

Mr. Crummyham (voiced by Curtis Armstrong) is a Monsters, Inc. supervisor. He transfers Tylor to MIFT when he learns that Tylor's parents work at a hardware store.

Monsters, Inc. Facilities Team

The Monsters, Inc. Facilities Team (or MIFT for short) is a department in Monsters, Inc. that deals with technical problems in the company. Besides Tylor and Val, MIFT consists of:

Fritz (voiced by Henry Winkler) is a one-eyed monster with a trunk who is the leader of MIFT.

Katherine "Cutter" Sterns (voiced by Alanna Ubach) is a three-eyed crab-like monster and member of MIFT. A running gag is that she is always mentioning other workers who died on the job.

Duncan P. Anderson (voiced by Lucas Neff) is the deputy supervisor of MIFT with four eyestalks. He does not trust Tylor and attempts to get him dismissed from MIFT.

Roto (vocal effects provided by Bobs Gannaway) is Duncan's hamster-like emotional support animal.

Roger Rogers/Henry J. Waternoose IV (voiced by Rhys Darby) is a five-eyed monster with green fur and blue tentacles who becomes MIFT's newest member after Tylor and Val are promoted to the Laugh Floor. He is the son of Henry Waternoose III.

Sunny Sunshine (voiced by Paula Pell) is a grey, frog-like monster with black lipstick. She is head of the receiving station at Monsters Inc. and is shown to be in a romantic relationship with Cutter.

Winchester

Winchester (vocal effects provided by Dee Bradley Baker) is a former member of MIFT. Due to his inability to talk (he can merely make raspberry noises), his co-workers never learned his name until he left the group; they had nicknamed him "Banana Bread", since he always brought banana cakes and pastries to the briefing room. While trying to get Tylor to return to MIFT, Winchester catches Ms. Flint's attention, who promotes him to comedian.

Roze

Roze (voiced by Bob Peterson) is Roz's identical twin sister who is given Roz's position as secretary after her investigation work is complete. She shares her sister's complete disdain for Mike.

Millie Tuskmon

Millie Tuskmon (voiced by Aisha Tyler) is Tylor's mother.

Bernard Tuskmon

Bernard Tuskmon (voiced by John Ratzenberger) is Tylor's father who runs a hardware store at the bottom of the apartment building the Tuskmon family live in.

Virginia Tuskmon

Virginia Tuskmon (voiced by Jenifer Lewis) is Tylor's paternal grandmother who lives with him, her son Bernard, and daughter-in-law Millie in season 2. She loved living in the Creaky Oaks retirement home but believed she was kicked out for being too loud and opinionated. However, in "It's Coming From Inside the House!", she learns after calling the home that she wasn't kicked out due to her behavior. This leads to her son finally admitting that he could no longer afford to have her stay there and cover the family's rent at the same time, so he moved her back in with him to save the family's meager finances.

Otis

Otis (voiced by Bobs Gannaway) is Monsters, Inc.'s new receptionist after Celia gets promoted to floor supervisor by Mike.

Gary Gibbs

Gary Gibbs (voiced by Gabriel Iglesias) is a dark-blue monster, and Mike's polar opposite who is talented at bowling.