Ryūgan

was a ninja from Takumi Village. He, along with the rest of Shitenshounin abducted Gaara's student, Matsuri, to get access to Gaara. They planned to use the One-Tailed Shukaku inside of him in order to resurrect Seimei so they could seek revenge against the Five Great Shinobi Villages, who they felt did not appreciate their village.

Four Heavenly Directions Arc
Ryugan's Garian sword acts like bamboo. Ryugan ambushed Gaara and Kankuro which ended with Kankuro challenging him. Ryugan had the advantage and would have killed Kankuro if Choji and Kiba didn't show up to help. Ryugan obliterated Kuroari and was ready to do the same with the other puppet, but Kiba had a plan. This plan was that Kiba would charge Ryugan and divert him while Kankuro took the time to repair Kuroari in order to trap Ryugan within it. Kankuro then used the Black Secret Technique Machine One Shot technique. Ryugan's agonizing scream could be heard as his blood was poring out of the doll. Ryugan's Garian sword was later taken by Houki.

Trivia

 * His name, meaning "Dragon Eyes" comes from Seiryū, the Azure Dragon of the East.