Shimotsuki Koushirou

Koshiro isthe name of Roronoa Zoro's teacher and Kuina's father. He has his own Dojo near where Zoro grewup and he wastheone who trained him. he is typically seen in flashbacks. However, recently, in Chapter 440, he makes a brief appearence when another student ofhis asked if he was really Roronoa Zoro's teacher.