are we sure this is actually by her? I have several of her artbooks and yamibou, and this doesn't look like her to me at all. the eyes in particular don't carry her trademark style.
I suspect that this is from one of the Benigyokuzui volumes, possibly in the one with Ilfa from To Heart 2 on the cover.
And it looks like Carnelian to me, especially with regards to the facial structure. I have the feeling that for this piece she didn't go for her usual glossy look.
Let's face it, Carnelian is 100% Adobe Illustrator these days. So whenever she does something unconventional, like, say, actually drawing a piece, noone can recognise her anymore.