O-ryo has a very standard tragic backstory that is meant to give complexity to her mean girl personality, but I do like the conclusion of her arc as she ends up spoiling herself to counter her rigid role of being a hostess. The most unrealistic take is the fact Aoi doesn't have any friends or people close to her enough to have attachment when asked. It's lazy writing to give Aoi reason to stay without a conflict outside of her trying to bled in with the ayakashi.