This paper toy is a chibi Ishida Mitsunari, a character introduced in the video game and anime series Sengoku BASARA, the papercraft created by smilerobinson. Ishida Mitsunari is one of the main characters, alongside Tokugawa Ieyasu.
Ishida Mitsunari was a loyal retainer of Toyotomi Hideyoshi. However, when former friend Ieyasu revolted and killed Hideyoshi, Mitsunari's heart became filled with hatred and he vowed to exterminate Ieyasu in revenge. Mitsunari gathered an army, including the likes of Sanada Yukimura and Ōtani Yoshitsugu.
Mitsunari fights using his ōdachi with an iaijitsu-style that delivers swift and gruesome death to any and all opposition. More information at wikia.
You can download the paper craft toy here: Sengoku BASARA - Chibi Ishida Mitsunari Free Paper Toy Download