So far, there is Tanya Birch, who is a donkey, and the two pony sisters - Jelly Bun, and Jelly Bean. I haven't quite figured out both of the ponies cutie mark, so I might fill those in later. For now, here's two pictures of Jelly Bun, one of Jelly Bean, and one of Tanya.
Jelly Bun: http://fav.me/dbyu1xb
Jelly Bean: http://fav.me/dbyu1xo
Tanya: http://fav.me/dbyu1xi
Alternate Bun: http://fav.me/dbyu1xb