Ratu Hemas, born as Tatiek Dradjad Supriastuti is the third child and sole daughter of seven siblings. She grew up in Kebayoran Lama, Jakarta Selatan. Her Father, Colonel Soepono Digdosastropranoto, was an official in the Indonesia Army who was born in Yogyakarta. Her Mother, Raden Nganten Susamtilah Soepono, was a housewife from Wates, Kulonprogo. Hemas went to school in Jakarta until she graduated from High School and continued to pursue her study in the department of Architecture in Trisakti University. She did not finish her study in the university and got married in 1968 Hemas then followed her husband and live in Yogyakarta
Every year Tatiek's family has the family traditionto go to her grandfather's house in Soronatan, Yogyakarta. Her grandfather was a retired palace official. In late 1960s, Tatiek met the oldest son of the late reigning Sultan Hamengkubuwono IX, Herjuno Darpito, who, later on, succeeded his father as Sultan Hamengkubuwono X. At the age of 19 Hemas was married to Herjuno Darpito and left her study in the university. Her name was changed for the first time as Bandara Raden Ayu Mangkubumi, before finally was changed to Gusti Kanjeng Ratu Hemas when Herjuno Darpito ascend the throne and became Sri Sultan Hamengkubuwono X. Her marriage was blessed with five children; Princess Mangkubumi, Princess Candrakirana, Princess Maduretno, Princess Hayu, and Princess Bendara.
In the beginning, Ratu Hemas activitíes in the palace of Yogyakarta were mostly social. She was active in Yayasan Sayap Ibu and the eradication of illiteracy in Yogyakarta. She became a member of People's Consultative Assembly for the period of 1997–1999 from the Faction of Group Representatives and served as the chief editor for Kartini magazine
In 2009, Ratu Hemas was reelected again as independent candidate for the Regional Representative Council for the period of 2009–2014 winning 80% votes from all eligible voters.
In November 2012 Ratu Hemas together with Laode Ida, I Wayan Sudirta, and John Pieris representing the Regional Representative Council, appealed the Constitutional Court to run a judicial review on the Law No. 27 Year 2009 and Law No. 12 Year 2011. These laws were considered as violating the clauses of the constitution, especially clause number 22 D concerning equal rights between the Regional Representative Council and the People's Representative Council. In legislation process so far, the Regional Representative Council was granted the authority to provide inputs but not to sanction the law. The Regional Representative Council request the authority to also sanction a law. According to the constitution, the Regional Representative Council has the right to propose a bill and it has exercised this right but has never been deliberated in the house.
