Vishnu

Vishnu is a demon in the series.
Vishnu is one of the primary deities in the Hindu pantheon. His epithet is "The Preserver" and is known for a kindly demeanor and interest in the welfare of humanity. In the Hindu religion, Vishnu is one of the three principle deities of the Trimurti along with Brahma, the Creator, and Shiva, the Destroyer. As the preserver, Vishnu maintains balance within the world and reincarnates into multiple avatars as needed. It is believed that he will appear as his final avatar Kalki and usher in a new age. After this, the universe will end and creation will start anew. He is depicted with up to four arms, blue skin, holding a chakra wheel, a lotus flower, a mace and a conch, and rides on the back of the bird Garuda. He also sleeps on the back of the great Naga named Ananta Shesha.
He is the husband of the goddess Lakshmi in all her incarnations. He may also be worshipped in the form of Harihara, the perfect fusion of Vishnu and Shiva.