Nitai is another name given to Chaitanya Mahaprabhu - the great Vaishnava prophet from Orissa. He was one of the greatest devotees of Krishna and spearheaded the revival of Hinduism in the eastern part of India. Gaur was his close companion and fellow devotee and the two are often inseparable when referred to, by their devotees.
The trinity is interpreted in various forms in Hindu philosophy... it represents earth, water, and fire... the Trimurti (Trinity) originated from Adi Shakti – or the Supreme cosmic Energy – as symbolized by a female form – the universal Mother... According to the Puranas, Brahma is said to be the son of the Supreme Being and his female energy, Maya – the cosmic illusion which keeps all life under a veil of separation from the Supreme One... In addition to being the creator of the universe, Brahma...decides the incarnations to be bestowed on each creature…