Sasame

is a young kunoichi of the Fūma clan. In search for her older cousin Arashi Fuma, she was first seen with her ski mask (which also doubled as her hat) over her face and fighting Kamikiri Fuma, Kagero Fuma, and Jigumo Fuma. When she did locate the lair, she ended up in a rope trap where she persuaded the three to let her help in exchange for seeing Arashi.

Post Sasuke Retrieval Arc
They managed to pull off a fake battle where Sakura tended to her wounds. Naruto Uzumaki tried to peep after Sakura Haruno threw him out of the building they were hiding in without explaining and was punched by her again. There, on the ground Naruto saw the spiders falling from the sky. After another attack from Kamikiri, Kagero, and Jigumo, she helped Naruto Uzumaki, Jiraiya, and Sakura Haruno in their search to find Orochimaru's lair in the Land of the Rice Patties.

Sasame planned on giving Naruto, Jiraiya and Sakura tea with a drug to make them fall asleep, and handing them over to Kamikiri in exchange for being allowed to see Arashi. However, the plan failed when Kamikiri revealed that he wanted to kill them instead of capturing them, and Sasame was knocked unconscious when she protested against that. Naruto, Sakura and Jiraiya revealed that they had only pretended to go along with her plan, and defeated the three Fuma ninja. Almost as soon as she regained consciousness, Sasame tried to commit suicide over having failed, but Jiraiya stopped her and convinced her to show them to the hideout.

Despite being ordered to stay behind, Sasame follows Naruto into the hideout and saves him from a slowly flooding room by opening the trapdoor, allowing him to catch up with Sakura. She later saves Naruto from Kagero's (who was disguised as Kabuto Yakushi) heart connecting technique by giving Sakura a seal that will break the connection upon being wrapped around her kunai. When she met Arashi, she saw what had become of her cousin she decided to help Naruto and Sakura in defeating him. After the incident, she decided to join forces with the Hanzaki Fuma and the remaining members of the Fuma clan to rebuild the clan's former glory.

Ryounin Arc
Sasame later made a cameo in episode 168 where she was among the people standing in the line for diet ramen at the Ichiraku Ramen Bar.