Isn't it a bit early to assume she's in love with either her own sister or a girl she never met?
The way she reacted makes me think she's mad at all of them for something else, maybe for their breach of her privacy.
If her magic ends up being nullification magic then this series is goated for me I love when there's only like one person in the series that has nullification magic
To Aru Majutsu, but the protagonist has a personality.
Estella figuring things out immediately was a super cool twist. The dynamic between those three should be fun, especially with Serina and Estella both trying to dodge "bad endings".
The equivalent exchange is unfortunately the gyaru is as dense as a neutron star.