Haku

Haku is a successful fighting coach who is really serious about what he is doing. Other people would describe him as arogant as he (metaphorically) doesn't know the word "losing" and he expects his students to be just like him.  He is convinced that he's the best and that everyone is looking up to him and he is not scared to show this attitude.
He is annoyed by the inability of the people surrounding him most of the time.