An energy weapon character background:
You were born into the brotherhood. You were a paladin by 20. Obviously, you prefer energy weapons over anything. One night you were leading a squad of two other paladins, 5 knights and an initiate to show him the ropes. It all went wrong that night. You were ambushed by a squad of extremely tough legionaries. There were 3 captains and many normal troops. You all were easily taking out the recruits but the veteran legionaries were giving you all trouble. Currently unbeknownst to you, there are two legionary snipers with 50cal antimaterial rifles.
They both targeted you as you were taking out the most legion members. They both hit you, one grazing the helmet leaving a gaping hole and they other cracking your visor making vision difficult. You throw the helmet off as quick as possible. At that point both paladins are still alive as well as the initiate. Two of the 5 knights are dead, leaving 3 still alive. You are firing away at targets with your plasma rifle you've had since you were 15, "Justice." Justice is an advanced plasma rifle with many upgrades: a scope, extended magazine, foregrip, sling, flashlight, and many things a normal plasma would not have. One of the veteran legionaries and a few recruits sneak up behind you.
With all the surrounding fighting someone somewhere shoots your gun a few times. You drop it and you get a glance at it. It looks badly damaged. You disarm one of the recruits behind you and get his machete. You are battling legion but you get surrounded. They get you down on the ground. At this point all the knights are dead and, miraculously, the initiate is still alive. One of the paladins screams at him "GO, RUN NOW!" But before he does he picks up Justice and slings it over his back. The initiate is running but with 3 legion troops 50 yards back. Your down on the ground unable to do anything and one of your fellow paladins runs at you, then you notice the red dots on him. Boom. Down he goes.
Now the only one left fighting is the other paladin, but he gets surrounded. A few legion members tackle him. One of the veteran legionaries takes his helmet off and slits his throat, right then and there. The legion takes you with them to a camp, but not before they burn your other fellow paladin to death. Back at the legion camp you are beaten up and tortured for information. When they threaten to cut your hand off you bust and give the legion brotherhood intel. The next day a squad of paladins busts into the legion camp and immediately retrieves you and leaves before their casualty count is too high.
Back at the brotherhood base you tell the Elder that you told the legion brotherhood intel. He kicks you out immediately. On your way out the bunker you see the initiate with a tool kit working on Justice. After your kicked out of the brotherhood you settle down in the Jean Sky Diving shack for a while. After that you head down to Primm to work for the Mojave Express. And thus Courier 6 is born.
Thank you for reading. There's a lot of holes in that but I just thought of it on the fly. I actually like that and want to develop that into it's own standalone fan fiction on a made up character, not courier 6. Gives you more freedom to do with characters and setting and time and what not. There is an in depth background for a energy weapons anti legion character.
Staff edit: this was a good read, but being one gigantic chunk made it a bit hard to follow. Spaced it out some, hope you don't mind!