Helena (Eye of the Gorgon)
From Tardis Wiki, the free Doctor Who reference
Sister Helena was one of the nuns at St. Agnes Abbey. She and the other nuns looked after the Gorgon. She also went to Lavender Lawns looking for the Talisman. She then went to Sarah Jane Smith's house and tried to get hold of Luke and Clyde but failed. She later captured Luke and locked him up. (SJA: Eye of the Gorgon)
