Vincent Ryder (Future)

"Big Vin" came from an alternate future timeline, the son of Olivia Ryder and Ethan Riddic, twin brother to Lanakila Ryder. He came to 2419 with Natalia Ryder-Singh's daughter Nora to help fix a few minor issues and potentially rescue his sister, Lana, who was never found in his timeline. Taking the alias "Vin Tama" and getting a job as a reporter. Keeping his finger on subtle timeline changes as well as ensuring that some crisis situations that occurred in his timeline. 
It took a while to finally reveal himself to his mother, but once he did, he realized that the timeline he came from was now an 'alternate' and any future timeline he would travel to would be completely changed from the one he came from once they rescued his sister.
As part of the rescue squad to rescue Lana from Monica Vinelli, Vin showed his mother and the rest of the team just how well trained he was. He was a Marine Captain, Unit Commander of a team they dubbed the 'Fightin' Five Oh Three' - or the 503rd Armored Infantry Division. Front line operators and typically the first into a war zone. 
Following Lana's rescue he joined up with his cousin Trinity and Ethan's Marine unit as a trainer and special forces operative. 
In his free time Vin enjoys working out, playing guitar, and writing a novel. As a child he enjoyed the works of an author with a clear pen name, Dr. Seashell. Then he realized that HE was Dr. Seashell. It was then that Vin realized the full meaning of Bootstrap Paradox. 
He's currently dating Kassie Kaine's mother, Karla Kaine - it's rumored that they secretly married at a casino on Dr. Soong's resort island. But neither will confirm, nor deny it. But they have been close and exclusive since meeting only a few months after his arrival, when he was assigned to do a story on her for the magazine he worked for as part of his cover. Yet another Paradox, his timeline he never really met Karla, she had went off world after a disagreement with her daughter. Or so Kassie claimed.
In a possible future timeline Vin and Karla have a daughter together.