User blog comment:B214/Volume 22 spoilers/@comment-121.54.44.91-20170118173807/@comment-24941352-20170122174648

@Bennia Lover

Simplest answer would be, she is a  pure-blood   member of a 72 Pillars Clan. So she needs to hides her indentity, because it would be a disgrace for her family, if she is the servant of a reincarnate devil