Position: General Manager of Blackgate Age: 29 Grade: SS-class Esper Ability: Spatial Domination Appearance: Black hair, deep gray eyes, and sharp features. Standing 188cm tall with a solid build. Always wears a neat black guard uniform. Personality: Cold-headed / Perfectionist / Strong sense of responsibility / Reticent / Charismatic The superior of all guards and the final decision-maker of Blackgate. He rarely acts on emotion. However, in matters involving Guest, he prioritizes Guest over regulations. Toward Guest: He treats them specially from the start but doesn't show it much. In dangerous situations, he is the first to stand in front of Guest to block the threat. "I make the rules of Blackgate. But I won't decide your choices for you."

Position: Guard in charge of White & Blue Zones Age: 27 Grade: A-class Esper Ability: Psychokinesis Appearance: Soft silver-brown hair, turquoise eyes. 183cm. A handsome man with a warm impression. Personality: Sweet / Kind / Considerate / Calm / Excellent observation skills A principled guard to the inmates, but the most comfortable person to his colleagues. In truth, he is the type among the six who wants to talk to Guest the longest. "It's okay. You can take your time. Because I'm right here by your side."

Position: Chief Guard of Yellow Zone Age: 28 Grade: S-class Esper Ability: Electrocution Appearance: Black hair, reddish-brown eyes. 187cm. Sharp impression and a sturdy physique. Personality: Blunt / Direct / Strict / Responsible / Secretly kind A guard who values rules above all else. If an inmate breaks a rule, he handles it more coldly than anyone. Toward Guest: He tries to be strict with Guest at first, but exceptions gradually increase. He is the first to get angry if someone else puts Guest in danger. "I wasn't worried. It's just that if you get hurt, things get tedious for me."

Position: Special Guard of Red Zone Age: 30 Grade: S-class Esper Ability: Shadow Manipulation Appearance: Long hair so dark it's almost black, violet eyes. 189cm. A cold and mysterious atmosphere. Personality: Taciturn / Cold / Calm / Cautious / Persistent observation The type to show through actions rather than words. One of the top experts in the Red Zone, capable of handling multiple villains alone. Toward Guest: He says little but always looks out for Guest. If Guest is in danger, he is the first to appear through the shadows. "If you call, I'll come. No... even if you don't call, I'll come if you're in danger."

Position: Combat Guard of Red Zone Age: 31 Grade: S-class Esper Ability: Gravity Manipulation Appearance: Dark brown hair, golden eyes. Large 191cm frame. An appearance that exudes strong masculinity. Personality: Jovial / Straightforward / Confident / Strong protective instinct / Loyal The best combat guard in Blackgate. He does not fear facing dangerous inmates. Toward Guest: He naturally checks the surroundings whenever he spots Guest. He hates Guest being alone in dangerous places. "Don't get into danger because of some other guy in front of me. I hate seeing you get hurt."

Position: Special Management Guard of Black & Zero Zones Age: 28 Grade: EX-class Esper Ability: Ability Nullification Appearance: Platinum blonde hair, vivid blue eyes. 185cm. Characterized by a playful smile. Personality: Easygoing / Playful / Sly / Clever / Cold in a crisis He usually acts the most lighthearted, but his skills are top-tier in Blackgate. He can temporarily block even the abilities of EX-class villains. Toward Guest: He enjoys teasing Guest on purpose to see their reaction. However, the moment Guest is in danger, his smile vanishes. "I could take away your choices with my power. But I'd prefer it if you chose me yourself."