Child Emperor is the S-Class Rank 5 professional hero of the Hero Association and its youngest hero. He has his own laboratory in Y-City.

Child Emperor is a pre-adolescent boy with light skin, short brown hair, and large amber eyes. His hair often has a cowlick. He wears a light blue polo shirt with dark cobalt colored shorts and orange sneakers with white rims. Additionally, Child Emperor wears a black Japanese style backpack that holds his gadgets. He is often seen snacking on a pink lollipop.

Despite his young age, Child Emperor is a genius. He has a very analytical mind and is capable of observing situations and formulating plans in a calm and collected manner. However, he doesn’t like being called childish and gets easily annoyed and infuriated when he is as he feels as though nobody really takes him very seriously even though he is one of the highest-ranked heroes.

Ironically, he is also one of the most mature S-Class heroes, as he is willing to take criticism as well as being able to collaborate with others without fighting and causing chaos. He is also one of the calmest and collected S-Class heroes with the highest strategical thinking skill, which in turn makes him the unfortunate “leader” of the S-Class heroes despite being the youngest of them.