Yūgao Uzuki

is a member of the Konoha's ANBU, and was Hayate Gekkō's lover.

Invasion of Konoha Arc
During the invasion of Konoha, Yūgao visits the memorial stone where Hayate's name is engraved. She swears to avenge him before leaving with her ANBU squad. She visits the memorial again during the Third Hokage's funeral, where she has a conversation with Kakashi.

Twelve Guardian Ninja Arc
Yūgao briefly appeared during the Naruto: Shippūden anime, catching Sora spying on Danzō's interrogation of Tatsuji. They apprehended him and turned him over to Tsunade.

Invasion of Pain Arc
In the anime, Yugao is one of four ANBU tasked with protecting Tsunade as she is using Katsuyu to heal the villagers.

Video Games
In Naruto: Clash of Ninja Revolution 2, she possesses techniques similar to Hayate's. She uncovered the identity of Hayate's killer and her battle cry when using Dance of the Crescent Moon when fighting Baki in the game changes to, "Revenge ... for Hayate!" She has a small role in the game's storyline, appearing in the antagonists' hideout to save Naruto, Kakashi, Gaara and Sakura from a group of missing-nin, stating that the ANBU would take care of the situation. However, she does not appear in the story after this. She also has a Team Special Jutsu with Kakashi.

Trivia

 * "Uzuki" is the old name for the fourth month of the Japanese lunar calendar, while "Yūgao" means "moonflower".