Richmond Machintosh is part of the crew of the UNSC Leviathan at the time of the battle of Reach. He is one of the six Specialists assigned to the ship. Mac is the teams medic. He has an incredibly short temper which is usually triggered by his lack of "real guns" or the shortage of people needing to be revived. Mac is surprisingly dangerous as his aggressive nature makes him an animal on the battle field, unlikely qualities for a medic, but if someone does go down, he's the quickest response out there. He is voiced by Elliot Gilbert.