Kyle Stewart

Kaishi Stewart is a member of the Koji Clan, former friend of Yoshi and Mike Koji and responsible for the former's assassination.

Background
Kaishi was a childhood friend of the two Koji brothers, and a devoted member of the Koji clan and a defender of its ideals. He was a calm, kind individual before losing his sanity. After coming to the realization that friendship and love mean nothing to him, he decided to cut his bond with Yoshi by killing him. Mike injured him with a lightning technique before losing consciousness. Kaishi managed to escape, and he left the country immediately.