Jefferson Ace

Child and old friend of Alice Kingsley, he served as a knight for the Red Kingdom of Carrolth on the world Spira until Alice and Storm returned to find a remedy that befell Alice.
Jefferson forms a bit of a one sided jealous rivalry with Storm, skeptical about his ability to support Alice. At first trying to seperate them, but once he realize that wasn't going to happen he decides to join the crew of the Praetorian as both extra muscle and also to chip in with his cullenary skills.

Jefferson is also rather secretive about his family relations, very selective on who he shares that information with.