Resistance soldier sent back in time to protect Sarah Connor.
Kyle is John's future father, making their relationship central to the timeline.
John realizes that Kyle will eventually travel back in time and become his father.
Marcus's bargain with John directly serves Kyle's rescue.
Marcus agrees to enter Skynet's headquarters to help John rescue Kyle and the other prisoners.
Kyle and Star travel together before their capture.
Marcus encounters Kyle and Star together during a skirmish with Skynet's machines, and both are subsequently abducted.
Explore the full interactive character relationship map of Terminator Salvation
Related entry on Wikidata (Q592358), public domain (CC0).