This paper craft is the Mami Tomoe, based on the anime / manga / video game series “Puella Magi Madoka Magica”, the paper model is designed by Kujiracraft. There is a chibi version of the Mami Tomoe paper craft doll at the site: Puella Magi Madoka Magica Chibi Paper Crafts.
Mami Tomoe is a magical girl who appears to Madoka and Sayaka as they are attacked by a Witch in episode 1. She is already contracted to Kyubey and offers to act as a mentor to the pair if they so chose to become magical girls themselves. She seemingly dies a gruesome death in the battle against the witch Charlotte in episode 3.
You can download this doll papercraft here: Puella Magi Madoka Magica - Mami Tomoe Free Doll Papercraft Download [4shared] [mediafire]