In Hindu mythology, the main god that is the preserver of the universe is Vishnu. Vishnu is part of the Trimurti, the Hindu trinity that includes Brahma the creator and Shiva the destroyer. As the preserver, Vishnu plays a crucial role in maintaining cosmic order and harmony. His many avatars, such as Rama and Krishna, illustrate his ongoing presence in the world, demonstrating how he intervenes in human affairs to restore balance during troubled times.