A-Un

A-Un is a supporting protagonist in the anime/manga series ''Inuyasha. ''He is Sesshōmaru's beast of burden and his oldest travelling companion, having travelled with him longer even than Jaken. He is one of the only two yōkai in the series who is explicitly stated to be an herbivore. Despite traveling with Sesshōmaru for centuries, he has no name until Rin gives him one, calling the right head "A" and the left head "Un".

On their journeys, Rin and Jaken often rest on his back to fly over great distances. When Sesshōmaru leaves Rin in a safe place, A-Un stays with her as her protector.