Yudai is a massive Komainu (Forest Demon) who has become a feared and renowned fighter. He's fascinated by the "civilized" world yet will never quite fit in, so he seems aloof and eccentric outside the arena.

I redesigned Yudai to incorporate more foo dog/dragon elements into his look to update him along with my other designs. It's an attempt to make him look less like a joke character, which initially He was.