In Hindu mythology, the deity known as the protector of the universe is Vishnu. He is part of the Trimurti, which includes Brahma the creator and Shiva the destroyer. Vishnu's role is to maintain cosmic order or dharma and his interventions often involve taking avatars to restore balance, as seen in his incarnations like Rama and Krishna. His significance extends to promoting virtues such as compassion, righteousness, and the preservation of life, making him a central figure in the understanding of law and ethics in the universe.