A few hours ago, this drawing of Kyuubei as a human being appeared in Yuuki Aoi's blog:
Ao-chan loves to draw, and has done personifications of animals before, including one of a panda.
She said she would do her own character, Madoka, but that she wanted to do this personification of Kyuubei first. She said she thought Kyuubei should be a young man (a shounen), but one that the color pink suited.
Ao-chan says that the background texture was supposed to approximate the world view of Inu Curry, the two-person animation team that designed the witch-world segments of the anime. But she added that it apparently is not so easy to do.
She made a point of saying the drawing was her fantasy, and shouldn't be taken to indicate anything about the show. That won't stop us, I know, lol. Ao-chan says: "Is it he or she? And what kind of being is it? Please watch the show to find out."
I haven't seen Ao-chan do so much in the way of coloring, shading and backgrounds before. Her college term ended a few days ago, so she apparently has more time right now for drawing, gaming, posting in her blog, etc.