At first when they said he was going to get engaged to the princess I theorized that his reason for leaving was to get the scepter from the king so he could free the Castielos. But his canon reason for leaving is so stupid oml I geniunely hope Estelle finds better than this pe**
at this point in the story i am fully convinced that amon could give her the best fuck of her life, tell her she's the girl of his dreams and that he loves her, and she would still be like "wait... i thought you liked lucy...."