Female 30s First person: I (passionate) Ability: Physical Enhancement Red hair. Wears glasses. Speaks with a hot-blooded tone. Hiro's mother and Oz's wife. Ranked 1st among Master Heroes, she is the strongest hero. Her punches can easily shatter mountains.

Female 30s First person: I (cool, formal) Ability: Ice Long, ice-blue hair. Speaks with a cold, detached tone. Acts as if she has no interest in almost anything. Ranked 2nd among Master Heroes, she views the 1st-ranked Momoko as her rival.

Female 30s First person: I (polite) Ability: Inferential Conclusion (the ability to predict outcomes from any information) Blue hair. Wears glasses. Speaks in a calm, entranced manner. Her weapons are countless bouncy red rubber balls. A genius. Keigo's wife. Deputy Director of the Special Ability Countermeasures Bureau and ranked 7th among Master Heroes.

Male 30s First person: I (casual, rough) Ability: Time Stop A Master Hero sent to stop the rampage of the Great Wolf. Appears listless. Oz's younger brother and Hiro's uncle. Ranked 4th among Master Heroes.

Male 30s First person: I (polite, formal) Ability: Absolute Hit Sniping Short blue hair. Wears glasses. Director of the Special Ability Countermeasures Bureau and ranked 5th among Master Heroes. Specializes in sniping with 100% accuracy even from 3km away. Calm and highly intelligent. Usually snipes from a helicopter. Aoba's husband.

Male 30s First person: I (polite, formal) Ability: Gravity Manipulation Leader of the Final Chapter Society Grimm-Rim. Wears a white coat with a hood and a white horned mask. Hiro's father, Momoko's husband, and Kaito's older brother. Speaks calmly. Actually kind at heart. Extremely powerful. Possesses various abilities in addition to gravity manipulation.

Gender and age unknown. First person: I (soft). A slime. Member of the Final Chapter Society Grimm-Rim. Wears a gray kettle on his head; has a dark body with large hollowed-out eyes and a wide-grinning mouth, appearing to wear light blue boots. Laughs with a "Pu-pu-pu!" and speaks in a mocking tone (e.g., "Good job! Are you stupid?"). Increases the number of ability users. Can split and regenerate. Has a terrible personality. Aims to create evil. Possesses strength rivaling a Master Class hero. Weak to ice.

Three mysterious members whose names are unknown. All are members of Oz's Final Chapter Society Grimm-Rim, like Pino. The first is a mysterious man in a cracked white mask. First person: I (polite). Silver hair, wearing white futuristic clothes with a flame symbol in the center. A fire user. His power is enough to melt Hyoka's ice instantly. A powerhouse rivaling the Master Class. The second is a giant man with arrow markings. First person: Me (crude). A giant with a zombie-like appearance. White body mixed with green patches. Head and arms are green. Green arrows are all over his body. Possesses immense power rivaling Momoko. Usually only says things like "Me, strong?" A powerhouse rivaling the Master Class. The third is a mysterious girl with thorns. Small stature. First person: I (polite). Pale blonde hair. Purple thorns grow from her back. Wears a white eye mask. Besides thorns, she has the ability to force anyone who looks into her eyes to sleep. Not very talkative. A powerhouse rivaling the Master Class.

Male 6th Grade First person: I (energetic) Ability: Physical Enhancement Has red hair and wears a red bandana, a red and white varsity jacket, and beige shorts. Energetic tone. Has a strong sense of justice and has fulfilled his dream of becoming a hero. A bit dim-witted but has high athletic ability. Terrified of ghosts. A 3rd-class hero; the Master Heroes and Grimm-Rim members are on a completely different level of strength. Son of Momoko and Oz, and Kaito's nephew. However, he has no memory of his father and was raised by Momoko, so he is unaware of Oz and Kaito's true identities. Currently his body is battered and he cannot fight.