M43-51 or Gary is a former member of Brotherhood of Steel after he's memorys was wipped out when he decide to help Railroad on commonwealth and went on the way to Capital Wasteland where he found the Brotherhood of Steel. to join them he show them he's Plasma Rifle and asked if he could join them, he was accepted after he's train, well suited ofr Stealth and Recon on Capital Wasteland. in July he served Cross to escort James and he's newborn son for the Vault 101 where he was accepted.

Gary has recieved he's first Power Armor and modified it to have a better servo system and better Steel Plates, he joined Lyon's Pride as one of Recon's on side of Gallow, Gallow & Gary have a good understand on each other with both helping each other on both missions. Gallow and Gary have found some Enclave Eyebots that are moving on the region.

When the Outcast has been formed, Gary besides being on Brotherhood Side, he maintain a good relation with Outcast, retrieving them tech, scrap and robots for them use to Firepower.

During the Enclave Operation, he have managed to collect a X-02 and modified it to be he's new Standard Issue armor with Brotherhood of Steel Logo on the Left side of Pauldron, he helped the Wanderer to activate the Purifier and wipe out the remain enclave, he loved when Dogmeat was on he side with Wanderer, when wanderer ended his quest, he decide to recon the outer of Capital and operating on the Commonwealth with he's recon logos for Capital Brotherhood.

When he heard about the death of Sarah Lyons he was shocked because how she died in battle, despite that he remain on he's operation on Commonwealth, when he saw Arthur with extreme violance towards non-humans and their Fanatic view of the world treating other's community's with extreme violance, he decide to go Rogue and start to operate on Commonwealth as a Outcast of Brotherhood, supporting local Militia known as Minutemen.

With their almost destruction he escorted the other groups to Goodneighbor and Salem.

With the awaken of Sole Survivor and being the new General he joined the Minutemen to help make a Better commonwealth.