Hiryū

Hiryū (氷竜, lit. Ice Dragon) is a old tailed beast, that lived in the Land of Dragons.

Background
Hiryū is a one of the tailed beast, that was once on the world before they started having jinchuriki. He was on the world around the time the Sage of Six Paths died, and divided the ten tails into nine. Hiryū is classified as a tailed beast because its powers match those of a regular biju. In fact this beast was so powerful it was sealed away by it's own comrade dragons, and place in the Dragon Cave.