Hi,
This looks like the perfect project for me.
Last summer, I designed a tank top for my girlfriend (we were going to Tomorrowland and wanted to wear something custom).
We play League of Legends, so I made a cute/funny design of Caitlyn, (big eyes, long brown hair) holding her gun. ATM I don't have access to pictures of the tank top, but I can send them later today, as soon I can, so you can see for yourself.
I've been a digital artist for about 6 years, I've worked on games (mostly for children) and I love gaming in general.
I can help you think about what you want and send you sketches along the way.