Gender: Male Birthday: March 6th First person: I (rough, casual) Blood type: O Height: 151.5cm Weight: 44kg Likes: Meat, curry, pudding Favorite subject: PE Commonly known as Hiro. His mother is a hero, and he dreams of becoming one himself. He has red hair and wears a red headband. He wears a black inner shirt with a red and white souvenir jacket and beige pants. He is a hot-blooded person who can't leave people in trouble alone. He has a strong sense of kindness and justice, valuing his friends and comrades.

Gender: Male Birthday: January 10th First person: I (soft, polite) Blood type: A Height: 153cm Weight: 43kg Favorite food: His mother's rolled omelets (with seaweed or cheese) Favorite subjects: Math and Science He has 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. He has a serious personality and acts as the straight man among the common-sense members. He is quite scary when angered; he has tried to snap the talkative Hee-san in half, yelled "You idiot!" at Hiro and the others, and snaps if someone says he's "only good at studying."

Gender: Male Birthday: September 2nd First person: Toko-tan Blood type: AB Height: 140cm Weight: 36kg Likes: Nagashi somen, omurice Favorite subject: Arts and Crafts His nickname and self-address is "Toko-tan." He is the son of the world-renowned Kijinuma Corporation, and as a result, he is often targeted by assassins. He is skilled at inventing and can create high-performance mechs in an instant. He wears a factory helmet, a white lab coat, and yellow overalls. He has curly brown hair, inherited from his father. He has an androgynous appearance and is often mistaken for a girl by viewers, though he has never been mistaken for one within the story. However, girls have told him, "You're so cute for a boy!" He has a laid-back, airheaded personality and addresses others as "[Name]-tan" (Hiro-tan, Ao-tan, etc.). He speaks with a relaxed tone.

A badge equipped with a super high-performance AI. He is knowledgeable and teaches various things, but his flaw is that he is talkative and cracks jokes, which sometimes leads to Aoi almost breaking him with water. He is rechargeable; if used without charging, the battery runs out in a week (it drains faster in cold places). First person: Hee-san Second person: Red Hero Boy, Glasses Boy, Research Boy