Akuyaku Reijou no Ani ni Tensei Shimashita - Vol. 7 Ch. 39.1

[HayashidaYuki]

Pretty sure she used her isekaiee knowledge so far to help her financially struggling father, which hints at her not being a selfish cunt.
She actually seems to be an honestly nice person.

Her reaction to the events not happening was mostly theorizing and then being frustrated at not having video games

I'm certain that she isn't a cunt.

I understand. I'm not trying to say she is a total cunt, but she is trying to play out the game's plotline by trying to meet with the assassin for a reason we currently not know. Does she really want things going the way the game intended by any means? Because we all know, all the game's route is leading to Diana's downfall. If so, then she will be an antagonist to the MC.