The gang
Yoo Ji-tae as Professor / Park Sun-ho
The mastermind of a 4 trillion won heist. He is the boyfriend of police inspector Seon Woo-jin and the Korean version of the original Professor who is portrayed by Álvaro Morte.
Park Hae-soo as Berlin / Song Jung-ho
A 41-year-old North Korean former prisoner of the Kaechon concentration camp, where he served 25 years' detention since age nine as a result of attempted defection. He tends to resort to violence and tries to use fear to threaten the hostages, unlike the Professor's intention to not harm anyone and is the Korean version of the original Berlin who is portrayed by Pedro Alonso.
Jeon Jong-seo as Tokyo / Lee Hong-dan
A North Korean woman with military training who was wanted for committing armed robberies and murders of loan sharks (who extorted penniless North Korean defectors) before the Professor recruited her for the heist. She serves as the narrator of the series and is the Korean version of the original Tokyo who is portrayed by Úrsula Corberó.
Lee Won-jong as Moscow / Oh Man-sik
An ex-convict, who raised his son Denver alone, after his wife left him. He was constantly in and out of prison prior to the heist and is the Korean version of the original Moscow who is portrayed by Paco Tous.
Kim Ji-hoon as Denver / Oh Taek-su
Moscow's son and underground fighter, who later falls for Mi-seon, one of the hostages at the Mint and is the Korean version of the original Denver who is portrayed by Jaime Lorente.
Jang Yoon-ju as Nairobi / Sim Young-mun
A con artist who was recruited by the Professor, she is the Korean version of the original Nairobi who is portrayed by Alba Flores.
Lee Hyun-woo as Rio / Han Joseph
The "maknae" (the youngest person) of the heist group and skilled hacker. He is a medical school dropout and son of an affluent family and the Korean version of the original Rio who is portrayed by Miguel Herrán.
Kim Ji-hun as Helsinki / Ko Myung-tae
Oslo's brother and former member of a gang in Yanbian, he is the Korean version of the original Helsinki who is portrayed by Darko Perić.
Lee Kyu-ho as Oslo / Lee Sang-yeon
Helsinki's brother and former member of a gang in Yanbian, he is the Korean version of the original Oslo who is portrayed by Roberto García Ruiz.
