Laynia Petrovna was born to Russian nuclear physicist Sergei Krylov and his wife, who were accidentally irradiated during an experiment. When her mother died during childbirth, Laynia’s father was told that she and her twin brother had died as well. The mutant infants were taken into custody by the state and, when their superhuman abilities first manifested in adolescence, they were turned over to Professor Piotr Phobos, head of a government-run school for training Russian mutants. Given the codename Darkstar because of her mutant ability to manipulate the ebony extradimensional energy known as the Darkforce, Petrovna studied at the academy alongside her brother Nikolai, codenamed Vanguard, and trained to become a government agent.
She was killed defending the Soviet Union from the Squadron Sinister. She has returned by the same means that the Presence brought his soon Vanguard back by.