This chibi papercraft is the Yukimura Sanada, based on the video game Sengoku Basara, the paper model is designed by midorijikano. Yukimura Sanada is one of the poster boys for this series, along with Date Masamune. He's actually one of the most distinguished warriors in the Sengoku Era who opposes Tokugawa Ieyasu to the end. Wields two jūmonji-yari.
His hot-blooded and "battle-crazy" character contrasts strongly with the Oushuu's head cool demeanor. In Yukimura's life battle is everything. His master and revered idol, whom he's fanatically loyal to, Takeda Shingen, is the commander of one of the strongest armies of the Sengoku. Shingen's method of educating Yukimura consists of punching him and giving him life lessons. Probably because of this, Yukimura is incredibly naive and completely ignorant of anything related to the opposite sex, leading him to be made fun of by Maeda Keiji, cringe in horror at the Maedas' lovey-dovey antics, and have humorous conversations with his ninja subordinate, the lazy and aloof captain of the Sanada Ten Braves, Sarutobi Sasuke. Another remarkable quality of his personality, mostly shown in the anime, is also his very respectful side for everyone he talks to: always adding suffix like -dono or -sama.
Yukimura's way of fighting is 100% "frontal", one-on-one, with no tricks or cheating. His ideal is to walk the path of the warrior, and constantly searches for new possibilities to test his skills, all the while supporting his master's goal to enter the capital and conquer the country.
Sanada Saemon-no-Suke Yukimura was a Japanese samurai, second son of the Sanada Masayuki. His proper name was Sanada Nobushige, named after Takeda Shingen's younger brother Takeda Nobushige. Unlike the Yukimura in this game the real Yukimura never fought at Shingen's side as he was only seven at the time of his masters death, but his father was a talented vassal and general to the Takeda clan.
After the destruction of the Takeda clan by Oda Nobunage the the Sanada clan including the young Yukimura yielded to the Oda clan but they freed themselves after Oda's death. The Clan was surrounded by hostile clans so in order to survive they changed loyalty to the one with the most power. Eventually they became the vassals of Toyotomi Hideyoshi who is said to have shown extreme care and hospitality to the young Yukimura even giving him the right to use the name of the Toyotomi clan.
After Hideyoshi's death Yukimura joined the western army while his older brother joined the eastern army. This proved to be a smart move because no matter who won the war the Sanada clan would survive.
Yukimura died at Osaka castle where his forces were greatly outnumbered by the invading Tokugawa forces. In the intense fighting Yukimura was badly wounded, leaving him exhausted. Soldiers from the opposing army quickly went to Sanada. Now too tired to fight back, Yukimura allowed the men to kill him, reportedly saying, "Go on, take my head as your trophy".
You can download the chibi paper craft model here: Sengoku BASARA - Chibi Yukimura Sanada Free Papercraft Download [4shared]