Freelancer Wyoming (Reggie)
Once upon a time, there was an advanced Artificial Intelligence program run by the Spartan Forces. From this program, many soldiers gained the heightened abilities the A.I. joining process lent them. Each of these soldiers was codenamed for a State, so there are forty-nine of them due to the unfortunate demise of Florida. This particular soldier was codenamed "Wyoming."
Wyoming was born in England, and was raised to love Queen and Crumpets. Unfortunately, his parents weren't quite as loving as his homeland. They beat him and punished him for things he never even did. This made him a very disturbed young man, and drove him to join the Spartans.
Almost immediately, he showed an aptitude for uncontrollable violence. The scientists in charge of the A.I. program quickly offered him a place in their ranks, and Wyoming graciously accepted. Then he punched the recruiting officer for taking too long.
When joined with his A.I., Wyoming suddenly became hardened, and much more in control of himself. He became capable of taking his time to carefully plan how he was going to execute his mark, rather than just shooting them in the face with a shotgun. He trained with a wide variety of weapons, including the sniper rifle he became very proficient in.
Near the end of his training, Wyoming realised the Spartan Forces just weren't for him. He had grown to be a ruthless killer, and the Spartans were far too orderly for him. Taking the lead from his fellow program initiate Tex (Nevada), Wyoming left the Spartan Forces to become a freelancer. He is now one of the most dangerous guns for hire in the known galaxy.
Unfortunately, Wyoming is far too diligent in his efforts. While attempting to take out Tucker on Sidewinder, he inadvertently allowed the ten megaton bomb that was Church to explode, destroying the present and sending everyone travelling through time. To this day, nobody knows the whereabouts of Wyoming.