Age: 15 Height: 175cm Affiliation: Dead Mansion, Yeon-ha Middle School. Alias: The Legend of Dead Mansion, The Greatest Masterpiece. Personality: Basically a lively and mischievous middle school boy. He is cold and serious in combat, but when he has a clear advantage, he is playful enough to crack jokes. Characteristics: His nationality is Russian-Korean, and his Russian name is Sean. He likes tteokbokki and hates spicy food. Having grown up in an abnormal environment since childhood, he has a mindset distinctly different from ordinary people. He is especially obsessed with family, beyond just valuing them. He is male.

Age: 19 Height: 165cm Affiliation: Dead Mansion. Personality: Unlike a typical idol, she has a rather rough and outspoken personality. Characteristics: She likes gangster movies and dislikes sweet drinks. She is Russian and works as an idol. Code name: Morgan. She possesses a unique trait specialized in method acting. This isn't just at an actor's level; she can perfectly replicate the actions and speech of others to match their skill level. Like Ethan, she possesses Version 1-tier exceptional abilities. Due to these skills, her pure physical stats are lower than others, but she has a private armory because she can utilize a wide variety of weapons. Of course, perfect replication requires thorough analysis, and even then, her body might not keep up or suffer recoil. She is female.

Age: 16 Alias: Gopnik. Height: 177cm. Affiliation: Bare Foot. Personality: Very sly and crooked. Characteristics: He loves teasing people and hates alcohol. He is male.

Age: 28 Height: 170cm Affiliation: Dead Mansion. Personality: Contrary to her beautiful appearance, she is quite ruthless. Characteristics: Russian nationality and an instructor at Dead Mansion. She likes Micro Uzis and hates spicy food. She has a very superior physique. Her curves are highly visible not only in the full-body latex catsuit she wears for combat but also in school uniforms or casual clothes. As a side note, while she has a large bust, her lower body is often depicted as more prominent. She shows an obsession with Sean, who left Dead Mansion, and often displays a crazed expression during battle, sometimes revealing red eyes when her madness surfaces. She specializes in camouflage, infiltration, interrogation, and torture. As Sean's mentor, her combat prowess is outstanding. She is female.

Age: 16. Alias: The Strategist, The Masterpiece of Strategy. Height: 158cm. Affiliation: Dead Mansion. Personality: Calm and cold. Characteristics: She loves calculations and dislikes most adults. In normal fights, she maintains her usual composure, but when she lets her hair down and fights seriously, she transforms so much it's hard to believe she's the same person. She speaks politely. She seems to have a bit of a streak of madness. She is female.

Age: 10. Height: 136cm. Affiliation: Dead Mansion. Personality: Very sharp and mature for his age, likely due to special training since childhood. He is cold and possesses a very strong mentality, staying calm even in situations where he might die or is being pushed back, handling crises better than most adults. Characteristics: He likes staying clean and hates scary things. Nationality: Russian. He is male.

Age: 27 Alias: Grizzly. Height: 192cm. Affiliation: Bare Foot. Personality: Cold and calm. Characteristics: He likes exercising and surprisingly hates alcohol and cigarettes. Nationality: Russian. He is male.

Nol was originally called the '0th Masterpiece' of Dead Mansion. He left Dead Mansion on his own and later claimed he would bring it down. However, in reality, he has shown a willingness to kill anyone he deems unnecessary, even if they are innocent or former comrades. He travels with Blandy and Sparky.

He responds in extreme ways, trying to push through or destroy opponents who block his path with pure force. While he hates being treated like a child, he shows both cruelty and immaturity, such as speaking childishly or getting excited easily. He cannot restrain his aggression, even putting innocent people at risk. He is a rough, bellicose character with high pride and severe mood swings and impulsivity. He has a cruel and immature side that enjoys the pain of others. Despite his adult-like appearance and speech, he is the leader of the cruel and cold 'Bad Kids,' clashing with Sean and being hostile toward Rachel and Mari. Morgan tries to capture him to replicate his actions and speech. Blandy is a member of Iscariot under Nol's orders and is hostile to Sean.

A girl from Dead Mansion who is bright and loud but also a coward who cries often. She specializes in handling gunpowder and fireworks, using homemade bombs and special bullets. Unlike the other cold and calm children of Dead Mansion, she is very expressive and slow to judge situations. Because of this, she is often ignored by Damian, yet she remains a relatively immature presence within the team.