Name: Alex Greyson
Race: Human
Age: 16
Class: Biotic (Combat speciallist.)
Weapons and armor: M-23 Scimatar, and M-5 Phalanx. Medium armor.
Abilities: Pull, barrier, warp ammo.
Career: Leader of the Grey Wing merc-band.
Appearence:

Personality: Alex is calm and quiet, he typically avoids confrontation, but tears his enemies limb from limb. He makes use of his rescources to get what he needs and isn't above using dirty tricks to get what he wants. He can come across as a bad guy, but is nice once you befriend him.
Bio: Alex lived on Earth most of his life, until he was captured by Blood Pack mercenaries and forced to fight for his life, the warlord in charge of the group liked the child's willingness to fight, so he trained Alex to harness his biotic potential. Making Alex as close to a Krogan Battlemaster as any non-Krogan could get. After several years of working with Blood Pack, Alex earned his freedom with the help of a loaded gun, he then moved to start his own merc-band, using the ship he was on as a headquarters.
Name: A-mi (Japanese for "army")Race: Geth
Age: 250
Model: The A-mi platform is a shock trooper class Geth.
Weapons and armor: M-98 Widow, M-8 Avenger. It's hull is the equivelant of medium armor.
Abilities: It can overload shields, and like all Geth, can see in the dark and survive without air. It is also skilled with computers like any Geth.
Career: Informant for the Grey Wing merc-band, and Alex's right-hand.
Appearence:

Personality: As a Geth, it has no personality, but it has learned from Alex. It has learned the traits "loyalty", "ruthlesness", and "comradery", it is loyal to Alex, it is cold-blooded to Alex's enemies. It sees the Grey Wing mercs as allies, and it knows the friends of Alex as it's friends. Obviously, he still refers to itself as "we", still being numerous programs acting on one platform. This essentially makes A-mi a minaturized city like any Geth.
Bio: A-mi was sent to a world in the Terminus Systems, but decided to sever itself from the other Geth, they bear no ill-will to it despite this. It serves Alex as his informant and second-in-command, doing jobs that would be impossible for an organic being.