Boke Sakura

Sakura Boke is Tetsu's grandfather. His real name is "Saku Raboke" and "Sakura Boke" is a nickname as well as a misinterpertation on his family regestry. He like all the other members of the Sakura family are not related but Tetsu is unaware of this fact. Saku is the remaining survivor of his family that died in assumably world war II.