I just saw a scene in WATGBS and there are some witch cameos there, some that are not even mentioned in this wikia... You can see the silhouettes in Rpgmaker2000 labelled as: 

"Pic-Witches- #" (In order):

Chlomaki, Shiroame, Kaen, Tetzusora, Tokionome, Hanahata, Wadda, Starlit, B. Mary, Sagan, Not sure. Possibly Anemiya, Touya, Tuchikure, Shiroma, Posibly Kagimory, Ptomain, Posibly Ziki, Yohira, The Twig Witch, Posibly Syakomori, And finally, Daimajo.

This would add Shiroma, Ptomain, ZiKi, Kagimory, Twig Witch, Syakomori, Yohira and Anemiya to the cameo characters in wadanohara.

(Should we add those sprites to the galleries?)