The Medic, healer of troops and wearer of glasses, is unlocked at Headquarters level 15. He’ll increase the survivability of your troops so that you may launch a more devastating attack.
The Medic is the only troop that won’t follow flares; instead he tracks nearby wounded troops. Medics can also heal each other, because they’re good team players like that. Only deploy Medics to support other troops, as they never deal any damage themselves.