Princess Tiffany and Jenna the Magical Mule

These two are characters I came up with for a comic series a while back. I kind of just dropped the story because I thought the premise was... well kinda dumb. But I had the urge to draw them anyways.

Short version of the story:
Spoiled Brat Tiffany makes her Dad buy her a pony for her birthday. 
Dad buys a mule instead at a flea market.
The mule (Jenna) is actually a mystical being who has lived for over a thousand years, has the ability to speak, and has many wondrous powers.
Hilarity ensues.

Sorry that the couch looks terrible.