Thirteen (Méihuā Shísān, Simp. Chinese 梅花十三, lit. Plum Blossom Thirteen) is a mysterious masked assassin and anti-hero. She is known for slyness and specialized hair fighting style techniques as well as her cold persona and beauty. Seven happens to develop a crush on her after their second encounter, despite her attempts to kill him, and he tends to hit on her. As the Thirteenth Daughter of the Plum Blossom Swordsman, she comes from a prominent family facing peer pressure.