Kyle Reese

History
Born after Judgement Day, Kyle became a loyal soldier in the fight against the machines, becoming the second in command to resistance leader John Connor. When Skynet figured out how to send an assassin back in time to kill John's mother Sarah Connor before he was even born, Kyle was sent to protect her. He soon fell in love with Sarah, and eventually fathered John before being killed by the Terminator. With Judgement Day averted, Kyle would grow up to be a normal child.

Crossroads
Years after averting Judgement Day, an older John Connor would learn that Skynet had sent other Terminators back in time along with the one that tried to kill him in 1997, going into stasis just in case John survived. After defeating other assassins that had come for him, John harvested the memories of one of the Terminators and learned of back-up plans to kill Kyle Reese to keep John from ever being born.

John went to rescue his eventual father, but in the fight, Kyle was injured and his parents killed. John saved him but found out that Kyle had been blinded, meaning the odds of him being able to go back in time when he was an adult were low. John realized that he'd have to stop Skynet at its source to keep everyone safe. Fortunately, he'd been working on a way to accomplish that, but he'd need help. And now he had his 10-year-old handicapped father to raise to boot...