So I'm just going to post here as I come up with characters who will appear. 

Mikhail
Communist Capitalist. 
A Vladof black Marketeer. I imagine both accent and looks to be similar to Ivan Vanko from Iron Man 2. He is where we will get future guns, equipment, pretty much everything from, since we can't trade with legal dealers on this planet. He firmly believes that the military government will be overthrown and therefore considers all currency to be worthless. He only trades in favors. He will give you stupid missions that you must fulfill every time you want anything ever. Prepare to be annoyed by him.

Luke
Preteen Anarchist.
A young boy of thirteen. One of Actaeon's many citizens, and attends the standardized military based school, but is known for having truant officers on his back. Wears the military school's uniform most of the time, and speaks with a cockney accent. Runs errands for AMM. 

Romulus
A Silhouette
The apparent leader, and/or spokesman for AMM. You don't know what he looks like, or even sounds like. Speaks with a sophisticated British accent. Doesn't trust you.

Enemy types:

Dahl Soldier: The guys we just finished killing. Carry a plain shield and a rifle. Travel in squads of three Soldiers, along with a Captain. , one will carry a normal rifle, one a corrosive, and one an electric. This is a typical squad tactic. Tactics change with larger squads. 

Dahl Captain: The squad's tactical leader. Carries a booster shield, and often allows him/herself to be shot in order to drop boosters for their men. Weapons and grenades can vary, tend to be specialized. 

Demo men: Carry a rocket rifle and love throwing grenades. Have a bandolier across their chests that carry multiple different grenade types. Have an explosion resistant shield. 

Sniper: Have a cloaking shield and a sniper rifle. If you get too close, they'll switch to an SMG. 

Dahl Commando: Axton, basically. The best of the best. Carry multiple weapons(occasionally they will even carry non-Dahl weapons), and throw down turrets. Turrets stick to surfaces and have one of three mods: one way bubble shield, second gun, or a longbow mod. 
Commandos are the real heavy hitters.