Clevatess

Premise

After defeating a group of heroes and destroying an entire kingdom as revenge for attacking his lands, one of the Four Beast Kings, Clevatess, takes in a baby belonging to the kingdom's royal family. He resurrects and enslaves a hero, Alicia Glenfall, so she can help him take care of the baby while hoping to examine humanity more closely. Before long, they find themselves at war against Vorden, another one of the Four Beast Kings.

Characters

Main Characters

Alicia Glenfall (アリシア・グレンフォール, Arishia Gurenfōru)

Voiced by: Haruka Shiraishi (Japanese); Katie Wetch, Nia Celeste (young) (English)

One of the thirteen heroes who is killed by Clevatess, but later revived to accompany him on a journey with Luna. She is technically an animated corpse who is bound to Clevatess by his dark magic, preventing her from disobeying him or being killed. She is later given the younger appearance of a Hidenian and uses the alias Alyssa Sleihunt during her time at Solsein. She is eventually turned into a mouse-like monster by Dean, but upon entering Vorden's domain, she returns to normal and reverts back into an adult.

Clevatess (クレバテス, Kurebatesu) / Klen (クレン, Kuren)

Voiced by: Yuichi Nakamura, Mutsumi Tamura (Klen) (Japanese); Sean Letourneau, Morgan Berry (Klen) (English)

One of the Four Beast Kings who rules the dark lands. He has grown interested in humanity after the heroes' failed attack. When adventuring, he disguises himself as "Klen", taking the appearance of a young boy (whose name is later revealed to be Shiro) who died while protecting Luna, though he is weaker in this form. His true form is a giant dark wolf with many tails. He is not all that ruthless as he has no interest in conquest, but will attack anyone who threatens him and his lands. He is currently the caretaker of Luna and master of Alicia and Nelluru, as well as Luna's magic instructor following Dorel's defeat. During his time at Solsein, he uses the alias Klen Vatiss.

Luna (ルナ, Runa)

Voiced by: Saya Aizawa (Japanese); Lara Woodhull (English)

A baby who is the prince of the Haiden family, whom Clevatess, Alicia, and Nelluru take care of. Luna has a good influence on Klen as the baby’s presence is what keeps him from threatening humanity. It is later revealed that he is Toara's son and his real name is Toth. He is soon reunited with his mother. He soon develops the ability to speak and can use magical powers.

Hiden

The King of Hiden (ハイデン王, Haiden Ō)

Voiced by: Jun Hashizume (Japanese); Garrett Schenck (English)

The unnamed ruler of Hiden, who is killed by Clevatess for launching an attack on his lands. He is later revived by Hiden's forge. After failing to convert Luna into the next heir using the forge, he drops himself into the forge as a final attempt to destroy Klen, which ends in failure.

Toara Mort Anzetta (トアラ・モールト・アンゼッタ, Toara Mōto Anzetta)

Voiced by: Aki Toyosaki (Japanese); Molly Zhang (English)

Luna's birth mother and the princess of Hiden. She becomes Hiden's new regent after Dorel is killed and upon reuniting with her son.

Favio Fleep (ファヴィオ・フライイープ, Favio Furīpu)

Voiced by: Tasuku Hatanaka (Japanese); Mauricio Ortiz-Segura (English)

A loyal Hidenian servant who works for Toara.

Stefan (ステファン, Sutefan)

Voiced by: Mamoru Miyano (Japanese); Drew Breedlove (English)

One of the thirteen heroes who is murdered by Clevatess. He was considered to be the strongest and the leader of the group.

Mirlo (ミルロ, Miruro)

Voiced by: Yūki Ono (Japanese); Eric Wheeldon (English)

One of the thirteen heroes who is murdered by Clevatess.

Dark Beasts

Vorden (フォルデイン, Borudein)

Voiced by: Takaya Kuroda (Japanese); William Ofoegbu (English)

The oldest and strongest of the Four Dark Beast Kings, who has ulterior motives and an obsession for the Hero Legend, which he seeks to recreate. He is hunting for the Books of Toah and manipulates Dorel, Dean, and several students from Solsein to do his dirty work. The other three Beast Kings are at war against him. Like Klen, he can take on a human form, though otherwise, he has the appearance of a giant red dragon with six eyes.

Zavthier (ザフティエ, Zafutie)

Voiced by: Megumi Han

Zavthier of Ghosts, or Zavthier of Mist is one of the Four Beast Kings, who opposes Vorden’s plans and works with Klen and Rathwell to stop him. She is an angel-like being with long blue-green hair, and uses Sarasa to communicate with others outside of her realm. She is the only Beast King that is female.

Rathwell (ラスウェル, Rasuweru)

Voiced by: Tomokazu SugitaEp. 21 credits

One of the Four Beast Kings, who uses Edison's body as a vessel. He is a tiny, blue, insect-like parasite, who always controls bodies as vessels. He too opposes Vorden’s plans and works with Klen and Zavthier to stop him. He helped Edison improve his ability to manipulate coal.

Gart (ガルト, Garuto)

Voiced by: Takaya Aoyagi (Japanese); Dio Garner (English)

A shapeshifting dark beast who serves Zavthier as a scout and spy.

Boelate

Dorel (ドレル, Doreru)

Voiced by: Hiroki Yasumoto (Japanese); Mike Smith (English)

An antagonistic general who seeks to obtain arcanacites from the remains of Haiden for his kingdom Boelate. He is responsible for killing Alicia's father, whom he used to be partners with. He also possesses powerful magic and wields a Regalia sword. It is revealed that he is working for Vordin. He is soon killed by Alicia after she destroys his sword.

Maynard Swamm (メイナード, Meinādo)

Voiced by: Chiharu Shigematsu (Japanese); Kiba Walker (English)

Drel's second-in-command. He can control an army of giant insects. He is eventually defeated by Alicia and was imprisoned for his crimes.

Naie Chiffonlits (ナイエ・ヒッフォンィツ, Naie Chifonrīsu)

Voiced by: Tomoyo Kurosawa (Japanese); Mallorie Rodak (English)

A wizard who serves Boelate. She can control magnetism and fly. She is later sent undercover as a teacher in Solsein. By this time, she is now terrified of Klen and Alicia.

Mirea Renault Allozar Wers (ミレア)

Voiced by: Akira Sekine (Japanese); Jill Harris (English)

The princess of Boelate. She is Beis's daughter. Dean swapped bodies with her and imprisoned her in the Mirror Labyrinth, though her original appearance remains the same while in the labyrinth.

Beis Werz (ベイス・ワアーズ, Beisu Wāzu)

Voiced by: Hōchū ŌtsukaEp. 13 credits

Eslinn

Rod Royes (ロッド・ロイェス, Roddo Royesu)

Voiced by: Tomokazu Seki (Japanese); Aaron Roberts (English)

A general who is at war against Boelate. He can wield magic as well as fight. He is later sent undercover as a teacher in Solsein using the alias Matthew Barnes.

Miquel Mendes (ミケル・メンデス, Mikeru Mendesu)

Voiced by: Yūto Uemura (Japanese); Derick Snow (English)

Rod's second-in-command. He also works undercover as a teacher at Solsein alongside Rod using the alias Teddy Swann.

Uriel Esliel (ユリエル・エスリエル, Yurieru Esurieru)

Voiced by: Reiji KawashimaEp. 13 credits

The young king of Eslinn.

Owen Koath (オーウェン・コウース, Ōuen Kōsu)

Voiced by: Tomoya WarabinoEp. 13 credits

A sword saint who works for Uriel.

Solsein

Ray Rukereft (レイ・ルカアーエフト, Rei Rukerefuto)

Voiced by: Shūichirō Umeda (Japanese); Justin Briner (English)

A student who attends Solsein. He is calm in most situations and can use powerful magic. In the past, he became friends with Shiro. Once Ray learned of Shiro's death, he vowed to avenge him and kill Klen.

Mary Maryweather/Mary Mary (メリーメリー, Merīmerī)

Voiced by: Yurina Kikuchi (Japanese); Marisa Duran (English)

A student who attends Solsein. She can use magic and combat skills. Like Ray, she is calm in most situations.

Andrew Hwyp (アンドリュー・フウィプ, Andoryū Huwipu)

Voiced by: Tatsumaru Tachibana (Japanese); Ciarán Strange (English)

A student who attends Solsein. He is also capable of using magic, but is also addicted to Vorden's power.

Tigel Blouyer (ティゲル・ブォウヤアー, Tigeru Buroeru)

Voiced by: Ryōta Suzuki (Japanese); Alejandro Saab (English)

A student who attends Solsein. He is Leon's brother and they both specialize in magic. He and Leon are also very arrogant and hot-tempered.

Leon Blouyer (リオン・ブォウヤアー, Rion Buroeru)

Voiced by: Hiromu Mineta (Japanese); Ricco Fajardo (English)

A student who attends Solsein. He is Tigel's brother and they both specialize in magic. He and Tigel are also very arrogant and hot-tempered.

The Crows

Broco (ブロコ, Buroko)

Voiced by: Shigeru Chiba

The ruthless leader of the Crows. He is killed by Alicia.

Carme (カルメ, Karume)

Voiced by: Fairouz Ai (Japanese); Kelsey Cruz (English)

A woman who works at the Crows' headquarters.

Betty (ベティ, Beti)

Voiced by: Haruna Himeno

Broco's pet troll. She is killed by Klen, who uses her corpse to revive Nelluru.

Dagan (デイガン)

Voiced by: Taiten Kusunoki

Dagan is a large and brutish member of the Crows.

Fleeto

A member of the Crows. He is blind, but has excellent hearing, touching, and smelling. He is killed by Alicia.

Media

Manga

Written and illustrated by Yūji Iwahara, Clevatess started on the Line Manga digital platform on August 12, 2020, with the first collected tankōbon volume published on the same day; the thirteenth and latest volume was released digitally on July 8, 2026. The manga has also been published on Media Factory's Comic Alive+ website since April 24, 2024, as well as Webtoon since March 23, 2025. A new edition of compiled volumes started with the first and second volumes on July 5, 2024, followed by the third volume on August 28, then the fourth volume on September 28.

In February 2026, Yen Press announced that they had licensed the series for English publication, with the first volume set to release in August later in the year.

Anime

An anime television series adaptation was announced on July 2, 2024. It is produced by Lay-duce and directed by Kiyotaka Taguchi, with Keigo Koyanagi writing series scripts, Souichirou Sako designing the characters, and Nobuaki Nobusawa composing the music. The series aired from July 2 to September 17, 2025, on AT-X and other networks. The opening theme song is "Ruler", performed by Mayu Maeshima, while the ending theme song is "Destiny", performed by Ellie Goulding. Crunchyroll is streaming the series. Medialink licensed the series in Southeast Asia and Oceania for streaming on Ani-One Asia's YouTube channel.

After the airing of the final episode, a second season was announced, with the cast and staff reprising their roles. The season premiered on July 8, 2026. The opening theme song is "Foreshadow", performed by Maeshima, while the ending theme song is "Awake Anew", performed by Myth & Roid.