Kushiyatama

Kushi Yatama is a Kannagi and a former member of D.D.D who held the position of one of the Drei Klauen, along with Takayama Misa and Rieze. However, she and Yaezakura were separated from the guild after the Catastrophe and she then founded her own guild. In the anime, she has made her way back to Akiba and participates in Operation Capture as a member of the Watermaple Consulate Raid Party. She later joins the Shibuya Raid Team.

Like most other D.D.D. members and Hien, she originated from a Log Horizon fan fiction work called From a Remote Town. The story was then turned into an official side-story under the name of Kushi Yatama, Do Your Best!, in which she is the main heroine.

Appearance
Kushi has long black hair and wears Japanese armor.

Personality
Although Kushi has a big-sister type personality, she is also a bit of a trickster and gets scolded by Misa often for that.

Prior to the Catastrophe
Kushi was Yuta's girlfriend, which suggests that she may also have known Rieze, who is Yuta's childhood friend.

Fallen Guardian arc
Kushi Yatama and Yaezakura both participate as members of the Watermaple Consulate Raid Party. Although they were both members of D.D.D, they are not seen interacting with Yuzuko and Rieze, other members of D.D.D who were also in the raid party.

Route 43 arc
After Krusty's disappearance and with Takayama Misa away from Akiba, Rieze is left to deal with all the work on her own. Kushi is mentioned, but is not seen.

Homesteading the Noosphere arc
She participates as a member of the Shibuya Raid Team; by this time, she presumably has rejoined D.D.D. It is unknown whether Yaezakura also returned to the guild, since she is not present as a member of the raid party.

Trivia

 * Both Kushi and Yaezakura come from a fan work called Into a Remote Town. Their appearances and equipment are from submissions from fans of the story, and were adopted into the anime and light novel.