I did this a little while back, but this is a promotional image for my upcoming webcomic, tentatively titled "Project Demon".
The character on the left is a short, bratty, goth girl known as "Penny". She's got robot arms, a bad attitude, and her trusty demon blaster, originally a hairdryer, it was modified into a heat ray gun by...
Paula, the trusty mechanic of the group. She's a hell of a mechanic and has been in the demon hunting business long enough to know her stuff. She's taken Penny under her wing, and is planning to teach her how to build stuff, and how to fight demons effectively.

See the full-size version here: http://fav.me/d8s7f81