Enju is an introvert who prefers to be alone rather than in a company and to watch rather than participate. However he is still kind and willing to help others. He is also athletic enough to climb trees and jump down from high objects. Besides, he can fight with a dagger.
He used to have a younger sister whom he loved very much. She was killed in the war in which Enju himself took part as a soldier. This accident seems to have influenced Enju and strikingly changed him.