I think you captured Tara's feisty personality perfectly with this picture. She seems like such a good person who actually cares about the characters who she voices.
I love the chainsaw and the glitter glow around it. And poor Spike! What did he do? LOL Is the head still alive?
The only thing I would work on is the skirt pleats. Where she has her leg bent, I would think that part of the skirt would come down a little bit lower or have a few ridges from the folds. But I'm going by the length you have in the back of the skirt. I have so much trouble drawing them to actually make them look like pleats. Otherwise, this is a pretty cute picture.