I know everyone seems like disappointed about erase her memory and expect to explain to her but you forget that they're still child he has no power to protect her yet and I don't think he would think she would understand even if he say it like that he only think about how to keep her safe and...
Hey girl you know what people feeling is something that you can't control however you want feeling can gradually growth according to people treatment moreover he he treat her so kind so caring who would not start to have feeling if one treat her that way moreover he been treat her like that...
She's not related by blood her father and elios father is different in the chapter when the mother of the girl invite priest that reveal she's the daughter of that mother assistant