The Viscount

The Viscount was the assumed identity of a high-level British member of the Contract Forces of Africa who was detained by his Afrikaner compatriots in the same group, due to an attempt at embezzlement on oilfields.

Biography
The Viscount desired the oilfields the MPLA had, and intended to manipulate the Contract Forces of Africa into siding with the MPLA over the rebel group of UNITA so he could secure the rights to the oilfield for himself. He initially tried to hide this plan from his Afrikaner allies. However, the Afrikaner members of the CFA uncovered this plot, so the Viscount attempted to make it seem as though his fellow British allies were the ones who plotted the entire thing in an attempt to exploit the feud the Afrikaners and British had with each other stemming from the latter's actions to the former during the Second Boer War and use the confusion to take off. However, this plan resulted in his capture as well. Knowing full well that his British comrades if rescued will expose him if they were rescued alongside him, he made an SOS request in the form of a cut-out requesting his rescue, and only his rescue. As he couldn't give the request himself due to his predicament, he had a representative relay the message for his rescue instead, with Diamond Dogs getting the request. They then proceeded to rescue him, although they gradually grew suspicious of the mission request. He also suspected they're going to kill him anyways, although the Afrikaners implied they may spare him under the condition he reveals who sold them out, although Venom Snake interfered and rescued him. After he was rescued, the viscount relayed information about the Walker Gears being sold to the CFA, causing the deputy commander of the Diamond Dogs, Benedict Miller, to suspect Cipher, or more specifically, XOF's involvement in the sale due to the Walker Gears being Soviet technology that was only in the prototype stage. However, because the Diamond Dogs decided to rescue the other POWs in addition to him, they also learned the full story of what happened from one of them, and decided to lock the Viscount in the brig of Mother Base, also intending to become "extra persuasive" with him as a result of his actions to his compatriots.

Behind the scenes
The Viscount is a key character in the main mission Lingua Franca in Metal Gear Solid V: The Phantom Pain. If the player disobeys the mission request and rescues the other POWs in addition to the Viscount, the post-mission debriefing will have Miller, prior to informing Snake about the Walker Gear sales, also revealing the Viscount's duplicitous nature and imply that for that, he'll undergo more severe interrogation at their hands.