Aizen, Ana, and Axel do think Zhao Yifei really deserves to be in their group and family only because of her personality. She is willing to do anything to protect her loved ones even at the expense of herself.
Currently, their realm has been destroyed and the two of them are the remaining survivors, and in a difficult situation with the threat of disappearing in nothingness.
Zhao Yifei quickly started thinking about what decision she would take, she is the realm king and it is true that she knows what is best for her and her little sisters.
"Huff, I don't know anything about the family other than my little sister, if what you mean is to invite me to join your group with Lian'er then I will gladly accept your offer. Now, what do I need to do?" Zhao Yifei quickly made a decision.