Yagura Karatachi

Little is known about this Jinchūriki yet. They hailed from Kirigakure and was the host of the Three-Tailed Giant Turtle. However, when Deidara and Tobi fought the Three-Tails, Deidara claimed the beast was weak because it had no host. This might possibly be because this Jinchūriki died. Because of the varying masculine and feminine features of this Jinchūriki, their gender is unknown.

Speculation
It is suggested that this shinobi may be related to Yūkimaru, as they have similar appearances. Also, Yūkimaru can control the Three-Tails. It should be noted that Yūkimaru only appears in the anime.