Elizabeth and Songbird

My friend wanted a booth to sell some art at an anime convention, inviting me along with him. I've never done that before so I'm more than a little bit nervous. I wonder things like, "Will this sell? Am I wasting my time? Is video game art still applicable at a convention for anime?" Who knows. I'm still new at this painting seriously thing.

I'll upload the rest of the stuff I'm trying to sell soon.

Photoshop CS3 (because that's all I have)
Somewhere around 18 hours.

Please don't be afraid to tell me what you don't like and, how I could improve! That's always the goal.