Vislor Turlough's great-grandfather
From Tardis Wiki, the free Doctor Who reference
Vislor Turlough's great-grandfather was a Trion who helped set up a smuggling system and kept stolen goods for pirates in a dimensional vault at the Winter Palace. He was remembered as a black sheep.
During the Trion Civil War, Turlough's grandfather offered the Winter Palace as a refuge for the Trion Queen to protect her from the fighting. However, word of this reached Deela's father, who was a revolutionary. (AUDIO: Kiss of Death)