I like this one. Rumi and Lumi (and Lilja, to an extent) are already themed with Xmas. I, for one, have yet to see an elf with a green-based palette. So, Chumi with other colors than Xmas would be greatly appreciated. Other addition might include full-render 2D and back view (or side view, which both look hot in their own way).
Let's give Christmas theme to other ladies. Maybe Neema, Lilli, Narcillia, or any other ladies from various popular franchise(s) or even Dandon's older OCs that nobody knew existed.
Oh, yeah, by the way -- what are the other colors available from the poll?