Sentaro Daimonji

Sentaro Daimonji (大文字 煎太郎 Daimonji Sentaro?) is the heir to the Daimonji School of the Martial Arts Tea Ceremony, of which his grandmother is the current head.

Sentaro means "boiling great son," which may be a reference to the fact that he is about to inherit his family's legacy. Daimonji is "(Dai) faithful service to those older + (mon) problem (or some monkey reference) + (ji) pity"