Devdan was a spiritual man in India who acted as mentor to Number Eight after the death of his Cêpan.
While searching for food in his rabbit form, Eight, came across Devdan meditating. Eight teleported away and returned in his human form, so that he wouldn't reveal his secret. But, Devdan seemed to recognize him, despite his form, and later asked Eight if he wanted some lettuce.
Devdan taught Eight about Vishnu and Hinduism and trained him in Indian martial arts, such as kalarippayattu, silamban and gatka. He also guided Eight in using his legacies. However, after a while Devdan did not return to their usual place and Eight was alone again.