The appearance of Maiyarap is of light purple skin, a grinning mouth and crocodile eyes. He usually wears a kranok from headgear which is sometimes called Hang Kai (rooster tail). He was the son of Thao Mahayom, the demon King of the Underwater Kingdom and Chantharaprapha. His personal magical weapon was the Pattamarat pipe and the Mantra to hypnotize the troops. He took off his Soul and hid it in the Trikut Mountain. Maiyarap become the King of the Underwater Kingdom world after his father died. In one occasion, while traveling through the woods, he found Matchanu, the son of Hanuman and Supanna Matcha, his fish wife, and adopted him as his step son, Later, he was asked by Thotsakan to help him in the battle Maiyarap used his magic pipe to blow the magic drug which hypnotized all the soldiers of Phra Ram into sleeping, Then he carried Pha Ram to his underwater world. There, Pha Ram was imprisoned in an iron cage at palm tree plantation, waiting to be boiled to death. At the end, Hanuman followed him to the underwater world, fought with Maiyarap and finally killed him and freed Pha Ram.