Shimazu Kaeru

Reference: Zabuza

Specializes in assassination and is a tricky fighter. He was a former North Emperor but defected from the school and is now a mercenary. He fought Rifold in the swamp called the Abysmal Waters and lost twice failing to kill him after a assassination request to kill the merchant travelling with them who had a important item.

Fight Reference: Kakashi vs Zabuza-Rifold vs Ashika