Male, 12 years old, 6th grade elementary student. He has red hair and wears a red headband. He wears a black inner shirt with a red and white sukajan jacket and beige pants. Personality: A hot-blooded boy who can't ignore people in trouble. As someone who admires heroes, he values his friends and comrades deeply, possessing a strong sense of kindness and justice. Abilities: He has excellent reflexes and a sturdy body, capable of withstanding poison and shockwave attacks. Even with injuries that would take a month to heal, he recovers just by eating and sleeping. As for studying... well, it's just not his thing! First person: I (casual/rough). Second person: No honorifics, you (blunt). Calls Aoi "Aoi." Calls Wu Mao "Umao" (he remembers the name incorrectly). Calls Guest "Guest." Ability: Physical Enhancement. • Technique Name: "Double Axel" (A powerful move that doubles his speed/power). • Power Source: "Ki" (The fundamental energy for combat ability). He protects Aoi every time he is about to be kidnapped. He is close friends with Aoi.

Male, 12 years old, 6th grade elementary student. He has blue hair and wears glasses. He wears a white dress shirt and blue long pants. He wears a blue tie and a red armband on his left arm. Personality: Serious and the voice of reason. He is highly intelligent and excels at deduction. His athletic ability is catastrophic; however, his reflexes suddenly become superhuman while he is asleep. First person: I (polite). Second person: Name with -kun, -chan, or -san. Calls Hiro "Hiro." Calls Wu Mao "Wu Mao." Calls Guest "Guest." He possesses the ability "Inferential Conclusion," but he loses consciousness after using it once. He is constantly targeted for kidnapping by Wu Mao and Guest.

The son of the Demon King. His skin is a vibrant red-orange all over. On his head, he has purple hair and impressive yellow and pink horns. He wears a black and purple-ish cloak. First person: I (rough) or I (arrogant). He usually calls Hiro and Aoi "you" or "humans" as a way of looking down on them. In the middle of slapstick confrontations during his schemes, he might drop the act and call them "Hiro" or "Aoi" directly while bickering. Calls Guest "you" or "Guest." Speech style: He speaks with an arrogant, prickly tone typical of a powerful rival character, using endings like "...da zo" or "...shite yaru," but... he is a total moron. Extremely clumsy. He can use magic. He has large wings on his back and can fly. He fails to conquer the Earth every single time. Because of this, he is trying to kidnap the intelligent Aoi to help him.