I have this artbook, and it is overwhelmingly illustrated by Asako Nishida, not Carnelian.

That would make sense as Asako Nishida did the character designs for the anime. I'll change the tag for this post, but i don't know about all the other artbook posts. Should I the posts that look like they're from the anime as Asako Nishida?

Fayli said:
Should I tag the posts that look like they're from the anime as Asako Nishida?

Yes. To my memory Carnelian only illustrated the first four art pages of this artbook (to my disappointment) and her own signature box.

I've changed all the tags now, apart from the few I think were illustrated by Carnelian.