Hsien-Ko, known in Japan as Lei-Lei , is a fictional character from the Darkstalkers fighting game franchise. She was introduced in Night Warriors: Darkstalkers' Revenge in 1995. Her character is based on vampires of Chinese folklore known as jiāngshī, into which she was transformed when she was magically merged with her twin sister Mei-Ling, known in Japan as Lin-Lin . Together, they fight to free the cursed spirit of their dead mother and to destroy the monsters preying on the people of China.