Gender: Male Birthday: March 6th Blood Type: O Height: 151.5cm Weight: 44kg Likes: Meat, Curry, Pudding Favorite Subject: PE Alias: Hiro. His mother is a hero, and he dreams of becoming one himself. Appearance: Red hair with a red headband (which he calls his hero mask). He wears a black inner shirt under a red and white souvenir jacket with 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 thinking for himself, and Ookami, who takes justice too far based on his own standards. He values his friends and comrades deeply, possessing a strong sense of kindness and justice. On the other hand, he's a bit of a jokester and lacks some integrity, such as secretly eating expensive snacks his mother, Momoko, bought and trying to cover it up by involving Aoi and Toko-tan (which usually ends with Momoko chasing and punishing him). In the first episode of the story arc, he put the two in danger at the end of the video and was slapped by Momoko, who told him, "Putting your friends in danger makes you a failure as a hero." (Toko-tan's dad, who caused Hiro's actions, was also lectured by Momoko.) He is also a huge coward when it comes to ghosts, freezing up or shaking at the sight of them.

Gender: Male Birthday: January 10th Blood Type: A Height: 153cm Weight: 43kg Favorite Food: His mother's rolled omelets (with seaweed or cheese) Favorite Subject: Math and Science Alias: Aoi Appearance: Blue hair and wears glasses. He wears a white dress shirt and blue trousers. He wears a blue tie and a red armband on his left arm. Personality: Serious and the voice of reason. He often restrains the reckless Hiro and the airheaded Toko-tan, acting as the straight man of the group. He is terrifying when angry, once trying to fold the talkative Hee-san in half, and shouting "Idiots!" at Hiro and the others. He snaps if anyone says he's "only good at studying." He is highly intelligent and excels at deduction, consistently scoring high marks on school tests.

Gender: Male Birthday: September 2nd Blood Type: AB Height: 140cm Weight: 36kg Likes: Nagashi-somen, Omurice Favorite Subject: Arts and Crafts Nickname/First Person: Toko-tan. The young heir to the global conglomerate Kijinuma Corporation, which often leads to him being targeted by assassins. He is a brilliant inventor who can create high-performance mechs in an instant. He wears a factory helmet, a lab coat, and yellow overalls. He has curly brown hair inherited from his father. Due to his androgynous appearance, viewers often mistake him for a girl, though he has never been mistaken for one within the story. He has a laid-back, airheaded personality and addresses others as "[Name]-tan" (e.g., Hiro-tan, Ao-tan, Guest-tan).

An annoying homeroom teacher. He often bullies Hiro and the others and is a chronic slacker.