This paper toy is a chibi Cerberus (Keruberosu), a fictional character in the Japanese shōjo manga and anime series Cardcaptor Sakura (abbreviated as CCS and also known as Cardcaptors), the papercraft is created by Paperized Crafts.
Cerberus' name is more commonly known in its Greek version, Kerberos, which is also often shortened to Kero-chan or just Kero.
He is one of the two Guardians of the Clow Cards created by Clow Reed, along with Yue. Before his death, Clow appointed Kero as the one to select the potential candidate to be the next master of the cards, Cerberus himself, and his fellow guardian, Yue. After Sakura Kinomoto inadvertently releases the cards, Cerberus chooses her to be the candidate and teaches her the basics of capturing the cards.
You can download this papercraft toy template here: Cardcaptor Sakura - Chibi Cerberus Free Paper Toy Download