Supayagyi, born in 1854[1] as Hteiksu Phayagyi (ထိပ်စုဖုရားကြီး), was the eldest of three daughters between King Mindon and Hsinbyumashin.

[2] The ambitious Hsinbyumashin, after placing Thibaw on the throne, offered her oldest daughter Hteik Supayagyi, to be his queen.

Her marriage was never consummated, and Supayalat was known to have enforced monogamy on a Burmese king for the first and last time in history, despite Thibaw later marrying her youngest sister, Supayalay, Princess of Yamethin.

The royal family's reign lasted just seven years when Thibaw Min was defeated in the Third Anglo-Burmese War and forced to abdicate by the British in 1885.

On 25 November 1885 they were taken away in a covered carriage, leaving Mandalay Palace by the southern gate of the walled city along the streets lined by British soldiers and their wailing subjects, to the River Irrawaddy where a steamboat called Thuriya (Sun) awaited.