Sennin

Sennin was the master of Tōkajin and a hermit. His body was eaten by his pupil, but he was alive in the form of a plant because he did not reveal all the secrets to create the potions for eternal life. When he senses the demon-fighting aura in Kagome's arrows, he uses the last of his energy to change into the form of a bow, which Kagome uses to destroy Tōkajin.