Sakakibara Yasumasa

He is one of the lackey Youkai of Tokugawa Ieyasu. He is always sleeping, even when serving as one of Tokugawa's Footsoldier units. It is hinted several times that he is in fact fully conscious and merely pretends to be asleep to throw people off.

If captured on a second game, he inadvertently reveals Tokugawa Ieyasu's weakness to tempura to Rance.

Trivia
For historical reference, see Sakakibara Yasumasa and 榊原康政.