An asura.

Birth

मायावी was born to the great architect of the दानवस् , मय , of his wife हेमा , a nymph. मय fell in love with हेमा when he once found her dancing in देवलोक and the देवस् coming to know of it gave her in marriage to मय . मय took हेमा to the southern side of the हिमालय s and constructing a city there called हेमपुर stayed there happily. They got two sons named मायावी and दुन्दुभि . (Uttara Rāmāyaṇa) .

Death

Valorous मायावी fought against anybody and everybody. He once challenged बालि to a fight. But the mighty blows of बालि were unbearable to him and the defeated मायावी ran away from बालि and hid himself in a big cave. बालि followed him and when he reached the mouth of the cave he posted his brother सुग्रीव there with instructions to shut tight the opening of the cave in case he died in the cave in the fight. He said that if blood flowed from the cave the dead person was मायावी and if milk flowed from the cave the dead person was himself. In the cave a great fight ensued in which मायावी was killed. But मायावी by his powers of magic made the blood that flowed out look like milk for सुग्रीव and the latter thinking that it was his brother who was killed shut tight the mouth of the cave and went his way. (Sarga 9, Kiṣkindhā Kāṇḍa, Vālmīki Rāmāyaṇa and Pūrva Kāṇḍa, Kamba Rāmāyaṇa.