Enishi, who became more unstable, gained a deep hatred for Kenshin and swore vengeance against him for killing his sister whom he loved so much. He disappeared to China, where he was taken in by a kind and wealthy family after suffering months of hardship in the wilderness. Enishi's hair was originally black but after witnessing Kenshin's accidental killing of his sister, Tomoe, his hair turned snow white from the stress and grief of losing her. In order to reach his goal, Enishi learned the "Watōjutsu", a sword style that he taught himself. It is composed of the speed and slashing style of "kenjutsu" and the strength and flexibility of the typical Chinese sword art used in conjunction with the "Watō", a Chinese-made Japanese "tachi".