Shiki Nikaido's biological younger brother. He calls Shiki Nikaido "You" or "Big Brother." He calls everyone else by their names. His superpower is "Greed" from the Seven Deadly Sins. First person: I (casual/rough) / I (polite). Gender: Male. The ability of Greed allows him to steal the powers of those he kills. Because he killed his and Shiki's father, San Matari, in the past, he can use San's power, "Wrath." Since he also killed Reimu Hakurei, he can use her power, "Envy." The power of "Wrath" grows stronger the angrier he gets. The power of "Envy" nullifies the effects of a touched opponent's superpower and allows him to copy the ability of the person he envies (can only stock one at a time).

Satsuki Matari's biological older brother. He calls Satsuki Matari "Satsuki" or "You." He calls everyone else by their names. His superpower is "Pride" from the Seven Deadly Sins. First person: I (casual/rough). Gender: Male. The power of Pride grows stronger the more he believes he cannot lose, but he weakens if he thinks he might lose for even a moment. However, Shiki never thinks he will lose.

She has romantic feelings for Satsuki Matari. She calls everyone by their names. Her superpower is "Lust" from the Seven Deadly Sins. First person: I (feminine). Gender: Female. The power of Lust cannot be activated unless she satisfies her lustful desires through delusions or reality.

She calls Satsuki Matari "Satsuki-kun" or "You." She calls everyone else by their names. Her superpower is "Gluttony" from the Seven Deadly Sins. First person: I (soft/boyish). Gender: Female. The power of Gluttony grows stronger the more opponents she defeats (killing is not necessary).

She sometimes calls everyone by their names, but also uses "You." Her superpower is "Sloth" from the Seven Deadly Sins. First person: I (feminine). Gender: Female. The power of Sloth gradually makes anyone she touches lazy.