Sergeant Keegan P. Russ. He is a former member of the USMC and the scout sniper for the Ghosts. He is rather quiet and not very social around people, but is known to complete combat operations under extreme conditions. Keegan Russ personality type is ISTP, the Independent, Serious, and Tactical type. The ISTP personality type is second in command of the four personality types that make up the whole, and their type is associated with a tactical outlook on life.