The royal family that ruled the planet of Doan was known as the Doan Royal House. Around 980 BBY, tensions arose between them and the mining caste, with the situation worsening after the accidental death of Prince Gerran at the hands of the caste. Princess Serra, Gerran's spouse, was the daughter of Caleb, a healer from Ambria. In 980 BBY, Serra learned that a Sith Lord had killed her father. Believing this Sith Lord to be Darth Bane – the same Sith Lord who had threatened her twenty years previously, causing her father to make her escape the planet and adopt a new identity – she employed the Huntress to apprehend him. Subsequently, she transported him to the Stone Prison on Doan for questioning. However, following his breakout, she triggered an explosive device, causing the prison to collapse, and then escaped to Ambria. Bane, accompanied by the Huntress, who had become his new apprentice, Darth Cognus, pursued her there. Ultimately, Cognus murdered Serra, leaving Gerran's father as the sole remaining member of the Doan Royal House.