 Rama's wife Sita, his brother Lakshman, with his devotee and follower Hanuman all play key roles within the Vaishnava tradition as examples of Vaishnava etiquette and behaviour.Ravana, the evil king and villain of the epic, is presented as an epitome of "adharma", playing the opposite role of how not to behave.The Mahabharata is centered around Krishna, presents him as the avatar of transcendental supreme being.