Sita is the consort of Pra Ram, the hero of the Thai Ramakian epic myth. Pra Ram is the incarnation of the Hindu Deity Vishnu Narayan, born on Earth in order to punish the Demon Yaksa Tosagan and to fight for the return of Sita, who is esteemed as a paragon of spousal and feminine virtues for all Hindu women and is known for her dedication, self-sacrifice, courage and purity.
After Pra Ram rescued her, Sita refused to leave the battle and chose instead to prove her courage and dedication to preserving the human race. She began by walking across burning coals to show she carried no impurities from her imprisonment, and when she emerged unharmed from the flames she knew she had a powerful weapon to use against the evil forces of Newerth.
See also EN version of this avatar - Lady Sita.