Liu Xuelan (劉雪蘭) is an assassin and member of the Sunset Ravens. She is known as Untouchable because of her strength and the fact that she is the number 1 ranked Darwin's Game player in Japan.
Darwin's Game
An unknowing Sudou Kaname is invited to try out a new mysterious mobile app game called Darwin's Game, but later realizes that he's in for more than he's bargained for when he finds out that there's no way to quit the game.
