Child Emperor

Isamu, better known by his hero alias Child Emperor, was formerly the S-Class Rank 5 professional hero of the Hero Association and its youngest member, running his own laboratory in Y-City.

Despite his young age, Child Emperor is a genius with an exceptionally analytical mind, calmly observing situations and formulating plans that leave far older heroes scrambling to keep up. He resents being treated as merely a kid, growing frustrated whenever people fail to take him seriously despite his high rank, but he's also unusually mature for an S-Class hero — willing to accept criticism and collaborate rather than clash with others. His caring side surfaces often, from prioritizing an antidote for wounded allies over glory-chasing kills to showing genuine concern for Pig God's well-being after a dangerous meal.