Sonic Channel staff on their blog:
It is Rouge cosplaying a witch in accordance with Halloween!
It is Rouge who has often showed her wearing different costumes so far, so naturally the masquerade attire this time also looks really nice, doesn’t it?
Yes! Heart, candies, pumpkin, Halloween. This time, I considered it difficult up to the detailed depiction of jack-o’-lantern in it, but there you go!!