Tiffany Smith was a UNSC Orbital Drop Shock Trooper and operative of the Office of Naval Intelligence's Secion One, despite her being a member of the Marine Corps. Through 2622, she worked with other operatives of ONI to gather intelligence to aid in the UNSC's war against the New and Old Covenants. During the massive Operation: RED SUN, she would be injured on the first day but would return after five more.