Hermit Wizard/Sennin
Name translates to "hermit wizard"

The Peach Man was originally the pupil of the Sennin. He is now kept 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 the Peach Man.