@Podi125 True. That's as such, is not so surprising considering they are facing the monster threat and her work can save lots of lives, even make a difference in the big picture of the ongoing fight. So, it's natural they would want to keep her and do all kinds of little things to keep her on a short leash, like you said. Since that's realistic, it doesn't bother me as such. It's what they logically would at least try to do. The thing bothering me is that she's accepting it all without a single complaint. It's one thing to love her work, which all the time produces satisfying results and she's concretely helping people she values. But at the same time, she doesn't seem to be bothered at all by that extremely short leash. She's little better than an indentured servant, except for the seemingly gentle treatment and attention she gets. She can't even leave the palace area on her own, not that she could do much out there without money.
I don't care how handsome Sei thinks the men around her are. She should strive to be her own woman, now that she's in a fantasy world. Right now she's no better than the harem women flocking around an MC dude in a shounen series. I dislike weak-willed main characters, regardless of their gender.