This touhou project paper toy is Lyrica Prismriver, one of the many characters in the Touhou Project, she is a poltergeist and one of the three Prismriver Sisters, the papercraft created by Ponta, and Graphig Template from Nasos. There are also Lunasa Prismriver and Merlin Prismriver on the site.
Lyrica wears red clothing, is a keyboardist, and is the third sister. She has brown eyes, short light brown hair, and is always seen with her winged keyboard floating nearby. The keyboard has "L.P." written. Her band uniform is red, with pink and black trim. Her hat has a green shooting star decoration at the peak. Her alternative outfit in Phantasmagoria of Flower View is the same as her normal outfit, except her hair is lighter in color, her clothes are yellow, and her hat's shooting star is blue. Her keyboard has "Prismriver" written on it. According to ZUN's emails, she is also the shortest of the three.
You can download this papercraft toy here: Touhou Project: Prismriver Sisters - Lyrica Prismriver Graphig Template Free Paper Toy Download