William

William was a cyborg commander of Desperado Enforcement LLC.

Early life
At some point during the late 2000s, early 2010s, William ended up experimented on by the Patriots, resulting in him becoming a cyborg. His left arm, in particular, was replaced with a prosthetic, containing data from the Patriots.

After the Patriots' fall, he ended up joining Desperado Enforcement LLC., eventually rising up the ranks.

Desperado Incursions
In 2018, William was deployed to Guadalajara, Mexico, to guard one of their labs while they proceeded to remove various abducted childrens' brains for the Sears Program. A Month after the first batch was completed, he later led three cyborg soldiers and two Raptor UGs to attack the Maverick member Raiden, after learning of his presence inside the lab and ordered a search. Raiden, who had just discovered the cyborg brains when he heard their commands to search for him, ambushed them and wiped them out, also taking William's arm in the process.

Behind the scenes
William is a character in Metal Gear Rising: Revengeance, as well as one of thirty cyborgs to contain retrievable left arms in the game. He acted as the first cyborg commander in Chapter R-02, attacking Raiden shortly after the cutscene where Raiden discovered the brain casings. His voice was also briefly heard in that cutscene, where he shouted "Find him!"