Linea

Linea was a megalomaniacal, unstable, unethical scientific genius who held the title Destroyer of Worlds because of the deadly diseases she made and unleashed on people. She was forced to suffer life imprisonment on an underground penal facility on a planet called Hadante. After escaping with SG-1 (who at the time, didn't know she was a mass murderer), she escaped from the SGC. She was later encountered on a planet called Vyus where she and the rest of the planet had all lost their memories to one of her experiments into reversing the aging process went awry. After a cure was found for the mass amnesia, she recovered her memory like everyone else and decided she would rather be better off without remembering that she was the destroyer of worlds and a mass murderer.