Thihathu grew up at the palace alongside his half-brothers Uzana and Kyawswa, and appeared to have been the black sheep of the family.
[4] Nonetheless, in 1275, he was appointed viceroy of Prome (Pyay), which was reestablished at the old city of Thray Khittaya (Sri Ksetra).
En route at Prome, on 1 July 1287,[6] Thihathu arrested his father and forced the king to take poison.
To refuse would have meant death by the sword, and with a prayer on his lips that in all his future existences "may no male-child be ever born to him again", the king swallowed the poison and died.
[8] Thihathu was married to Atula Dewi, the youngest and only sister of the three brothers who would later found the Myinsaing Kingdom.