In Hindu mythology, the god known as the preserver and protector of the universe is Vishnu. He is part of the Trimurti, along with Brahma the creator and Shiva the destroyer. Vishnu is often depicted as maintaining cosmic order and harmony. He incarnates in various forms, known as avatars, including Rama and Krishna, to counteract evil and restore dharma. His worship emphasizes protection, mercy, and the maintenance of the universe's balance.