You know, in actuality, Mikage going farther and farther off the deep end like this instead of talking about her feelings would probably end tragically. (She seems to be heading for gradually more predatorial territory... It's like the premise is waffling between her being a nice-seeming but terrifying girl and a terrifying-seeming but nice girl. As a result, I don't know what to feel about some things.)
@
apothem:
I don't know what resources you're looking at, but just considering the manga itself, how would this not be shoujo-ai? I mean, a non-romantic interpretation of Mikage's internal monologue and actions is technically possible, almost, but that would be really stretching things far past suspension of disbelief.
Honestly, if anyone said it wasn't shoujo-ai at this point, it would almost smack a bit to me of old "lesbians aren't real, that's just girls being overly affectionate" talk.