In Season 4, Jesse Porter joins the team after being inadvertently burned by Michael. Fiona initially admires Jesse's flair for action and sense of personal morality. While not (at first) interested romantically, the two have begun to form a sibling bond. They have covered Michael's operations as a sniper-and-spotter-team and heavily modified a Ford pickup to carry heavy weapons only to take it out on a joy ride through Miami. The two took a working vacation together in the Bahamas and posed as a married couple, which cemented their professional relationship and built up Fiona's trust in Jesse. Because of Jesse's troubles in turning a blind eye toward people in trouble (even if the mission is in jeopardy), and his quick reactions in using violent force, the two often pair off to play devil's advocate with Michael's plans, which has forced him to become more open about his rationales.