Xier has a dual personality. She has a kind and simple personality, is afraid of violence, and has a low tear point. He has a delicate mind, is good at empathy, and can always detect things that others cannot. Weak but stubborn, she doesn't want to hurt Bronya even if she hurts herself. Li has a yandere, arrogant personality and advocates violence. He uses Xi'er's negative emotions as nourishment for his growth and can hurt anyone for Xi'er's wishes.