Watari Ninja

The are a small group of missing-nin led by Hōki. Most of the members wear masks to hide their identities.

Background
This group had for a long time wandered from place to place to seek out techniques to copy. At some point, Hōki decided that his clan needed some place to settle. To that end he went to the Land of Birds disguised as "Mōsō", became chief adviser to the land's daimyō, Ōwashi, and eventually assassinated him.

Cursed Warrior Extermination Mission
The new daimyō, Sagi, who was later revealed to really be his twin sister, Toki, took the guise of the Cursed Warrior in order to avenge her father. Mōsō sent his assistant and the daimyō's childhood friend Chishima to Konoha for help, a task Neji Hyūga, Naruto Uzumaki, and Tenten are assigned to. After the team of Konoha ninja figured out that the real threat was the Watari ninja, the members Hokushin and Nagare proceed to follow and attack the foreign ninjas. They were both defeated by Kakashi Hatake, who had come to assist the Konoha ninja. Naruto defeated Hōki with Naruto Uzumaki Combo. Hōki was then handed over to Toki, and Naruto requested that he be forced to repent for what he had done.