U-Tomodachi is a pun on the Japanese word 友達 (tomodachi), which means "friend".
To extract a Pure Heart Crystal
The green-skinned U-Tomodachi has the appearance of a tall kindergarten school girl. She has white knee socks, white shoes with yellow heels, a red mini-skirt, blue top, and a yellow school bag with a yello strap that has a large black star attached to it. She wears a kindergarten hat with the Death Buster Star on its center. Her red hair is tied into two little pigtails with pink ponytail holders. She has big eyes that are black and blue and a red swirl on both her cheeks. Both of her arms are long and white with an opening on each end for her spiked jump rope to come out of.
Professor Tomoe created U-Tomodachi from a television show's episode script and Mimete took her to extract a Pure Heart from Yuu Kazama, a soap opera actor. However, she was unable to extract the Pure Heart because Sailor Uranus attacked her. The Sailor Senshi showed up afterward, and Mimete left, telling U-Tomodachi to fight them. She hated them too much to want to fight them, so ran off crying in Hotaru's direction. Before she could kill Hotaru however, Hotaru paralyzed her with her power, and Sailor Moon transformed into Super Sailor Moon and destroyed her with Rainbow Moon Heart Ache.
Unlike most of the Daimons, U-Tomodachi acts more like a child. She wants to make friends, but the Sailor Senshi refused. U-Tomodachi began to have a fit and jumps off.
She attacks with a spiked jump rope.