Reverse isekai villainess? That's cool.
Well, Olivia has the regular villainess backstory. Girl who gets ousted as the fiancé because of troubles beyond her control. But now she's Hanabi, a regular girl who's being bullied. But I really like the contrast between her past life and her current one. She doesn't need Oshino to help her like Luke. She can stand up on her own.
Hanabi must have felt so powerless at school. I feel really sorry for her. Hopefully, Olivia will be able to help her return, somehow.