Han-Zhau is… different compared to many Rokugani. He is too tall, a good sight more pale than most. His eyes are rounder, and he talks with an odd accent. Still, Emperor Toturi IX seemed to trust him enough to allow him to take the position in the first place, so as long as he stays on his boats, other Samurai seem to leave well enough alone. Of course, the problem is that he enjoys the fact that his presence makes others uncomfortable, and makes it a point to crash nearby courts whenever the opportunity presents itself.
A Kizoku is a familial title that is functionally the same as a Clan Champion. As the Tortoise clan champion is technically the Emperor, the descendants of Agasha Kasuga took the title of Kizoku as the functional leaders of the family.