This paper toy is a chibi school uniform version Kairi, one of several original characters appearing in the Kingdom Hearts video game series, and also one of the main characters in the series, the papercraft created by smilerobinson.
She is the original persona of Namine. Kairi was born in Radiant Garden and currently lives on Destiny Islands along with her two best friends, Sora and Riku.
She is four during Kingdom Hearts Birth by Sleep, fourteen at the start of Kingdom Hearts, fifteen during Kingdom Hearts II and sixteen during the events of Kingdom Hearts 3D: Dream Drop Distance. Kairi's name is derived from the Japanese word for "sea", though her full name is homophonous with the word for "nautical mile". [Source: wikia]
You can download the paper craft toy here: Kingdom Hearts - Chibi School Uniform Kairi Free Paper Toy Download