The figure in Hindu legends known for his role in the cosmic battle against evil is Lord Vishnu. As a principal deity in Hinduism, Vishnu is often portrayed as the preserver and protector of the universe. He incarnates in various forms, known as avatars, to restore cosmic order and defeat evil forces. His most famous incarnations include Rama and Krishna, each embodying the principles of dharma and righteousness. Vishnu's narrative highlights the ongoing struggle between good and evil, reinforcing the belief in the divine's active participation in maintaining harmony in the universe.