Rex

 Retainer for Marshall Haimon. Rex is his craftsmen, his builder, his foreman, and his intimidating thug. He is strong, very strong, and has been since his days in the Army corps of engineers. He served in both Afghanistan and Iraq. He is the man behind marshals war machine, making sure ammo is secured, armor is ready, and fortifications are set. He is the one who manages the men and assigns them to their duties when Jesse is not around. He is the master at arms.