Avril Lavigne

She is a member of Shadow Squad.

She is 3rd best assassin in the world.

She asks Xia Tian to become a member of Shadow Squad. He accepts but only with 2 conditions:

1) he will be the leader of Shadow Squad

2) she has to become his wife.

She is the daughter of Xia Tian's 3rd master (Allen). After Xia Tian killed the n°1 assassin, she rises and become the 2nd best assassin.

Trivia
She is the 10th woman to have s** with Xia Tian (Chap 860) and they had sex for 7days and 8 nights!