Seiichirou Kitano

The main protagonist, a boy whose face inspires terror and despair in other people's hearts. His true nature is that of a kind-hearted boy, and his gentle and caring actions mostly frighten those around him. He is used to getting hit for no apparent reason at all, so he develops speed and reflexes which allow him to absorb the power of the blows. Although he has no martial arts skill and doesn't like violence, this developed skill in itself is enough to make any skilled fighter lose their will to fight, so he is technically unbeaten.

(Source: Wikipedia, edited)