Enishi's arrival in China was not an easy one, he frequently found himself stricken with disease, and on the border of death. However a wealthy Japanese family took Enishi in and nursed him back to health. Once he was healthy again, Enishi murdered the family in cold blood, and robbed them of any valuables. While looting, he came across a book discussing sword arts, which laid the foundation for him to learn Wattojutsu, a combination of both Japanese and Chinese sword arts.At some time, he established connections with the Chinese Mafia, and furthered his wealth. It was Enishi who sold Makoto Shishio the Rengoku class battleship.
After spending over a decade in China, Enishi decided to return to Japan, and began his revenge on Kenshin. He recruited the help of those who had similar grudges against Kenshin : Banjin, Hyouko, Gein, Kujiranami, and Mumyoi, and sets in motions the plans to avenge the death of his sister, and his own torment. During Enishi and Kenshin's first battle at the Kamiya Dojo, Enishi was able to counter the Hiten Mitsurugi Ryu with his own Zetsugi (Ultimate Attack) and defeat Kenshin . Afterwards, he announced the true intention of his revenge, to take the person Kenshin holds dearest away from him. Kenshin and company were separated by a smoke cloud caused by Gein. Enishi came across Kaoru , and when she was next seen, she had Enishi's sword through her body and a cross scar resembling Kenshins. Seeing Kaoru dead, Kenshin ost all will to live, and went into a state of recluse, thus completing Enishi's plans for revenge.
Enishi is definitely insane, but is quite strategic, intelligent, sadistic, and very mysterious. Persistence is one of his greatest strengths, and he is a scheming genius. He is also short tempered, unstable, clever, ruthless, vengeful, and quick to judge. For transportation methods, he uses a hot air balloon. To remember his dead sister better, whom he referred to as Nee-san, he keeps her diary with him at all times and often reads it