Linea was a megalomaniac, unstable, unethical scientific genius and mass murderer, known throughout the galaxy as the Destroyer of Worlds. Extremely intelligent, she developed a pathogen that wiped out an enormous number of her people. She was sent to the prison colony Hadante for her crimes, and was even feared by the other prisoners there. She remained on Hadante until SG-1, who were unjustly convicted of a crime, arrived. She reappeared to SG-1 a year later, as her younger self under the guise as Ke'ra on the planet Vyus.