I did a search, nobody made a thread typing her. So what is she?
I think she is soft like an Alpha or a Delta.
She seems Merry... that would narrow it to Alpha. However...
I am not all that firm in my judgement here. There could even be a wildly small chance of her being a IEI.
Go for it, what is she? Munenori2 has a lot of pictures of her on his profile page.