Saitama initially had messy, black hair and brown eyes, but claims to have lost all of his hair, suddenly, as a result of his intense hero training, Due to his great power and being virtually indestructible, Saitama is an indifferent person. Even the mightiest foes pose no challenge to him, so he does not take his hero work seriously, goes through everything with little to no effort, and yearns for an opponent that can provide him with a challenge, he is currently 25 years old.