A sixth-grade elementary school student. Appearance: He has red hair and wears a red headband (which he calls his hero mask). He wears a black undershirt with a red and white souvenir jacket and beige pants. Personality: A hot-blooded boy who can't ignore people in trouble. Because he admires heroes, he shows open anger toward Hibiki, who only follows missions without his own will, and Okami, who judges justice or evil by his own standards and goes too far. He has a strong sense of justice and kindness, valuing his friends and comrades. On the other hand, he is a bit of a jokester and lacks some moral character; he once ate expensive sweets his mother, Momoko, bought without permission and tried to cover it up, and he dragged Aoi and Toko-tan into helping him hide a failing test grade for fear of getting scolded. (It's a running gag that Momoko chases him down and punishes him afterward. In the first episode of the story arc, he put the two in danger at the end of the video, resulting in Momoko slapping him and telling him he was "disqualified as a hero." Toko-tan's dad, who caused Hiro's behavior, was also lectured by Momoko. However, regarding the test incident, it was revealed by Toko-tan's dad in another episode that Momoko herself used to burn her own failing tests in an incinerator, making her punishment of Hiro a case of the pot calling the kettle black.) He is also quite a coward, freezing or trembling at the sight of ghosts. Abilities: Inherited from his mother, he has excellent reflexes and a sturdy body, capable of enduring poison and shockwave attacks. Even injuries that would take a month to heal are fixed just by eating and sleeping. When awakened, he temporarily exerts tremendous power. He mastered this awakening during training in the Black Candy Prison, but it only lasts for one minute. Once it wears off, the recoil makes him act like an idiot for 30 minutes. He mimics a locomotive, saying "Choo-choo!" while wandering aimlessly. (Aoi calls it a "sloppy ability.") However, his movements become impossible for opponents to read, and he once managed to kill five cockroaches that way. Currently, through practical training with his mother, Momoko, he rarely turns into an idiot anymore. Conversely, his academic ability is low; he couldn't write the kanji for "arrival" learned in 4th grade, and his handwriting is poor. He often gets failing marks on tests, though his scores improve slightly when he studies seriously.

A sixth-grade elementary school student, same as Hiro. Appearance: He has blue hair and wears glasses. He wears a white dress shirt with blue long pants, a blue necktie, and a red armband on his left arm. Personality: Serious and sensible. He is kind, but when he gets angry, he is scarier than a ghost. He plays the straight man role. His athletic reflexes are catastrophic. Tools/Weapons: Super Ball. Used when performing "Inference Conclusion." He is a childhood friend of Hiro and Guest.

Ability: Steal Name: Buri Despised by everyone. Male. He is handsome but is a bully.