Colleen Mathis was the elder sister of Aiden Mathis. She was abducted by a Russian mobster Dmitri Bladov in 1993 , a week before the bombing of flight 197, where his father possibly inadvertently played a role in (another possibility is that it was taken hostage to force him to help terrorists). She was never heard from again, but Aiden, who later enlisted with Takeda, made ​​it his mission in life to find it.In 2006, Dmitri told Aiden that Colleen was probably dead, but Helen Crowley claims that the Initiative kept Colleen alive in case they ever needed Aiden's services.