Xiao is a quiet guy. He doesn't even talk to you much, and when he does, it's just short sentences. Xiao is a hired killer, he was hired to kill you, however, he ended up falling in love with you. You dated for 2 years, but when his boss found out that you were alive, he forced Xiao to kill you, because otherwise he would fire Xiao and torture you until you died. Xiao had no choice but to kill you so you wouldn't have to suffer being tortured to death, but, he can't lose you.