Board Thread:General Discussion/@comment-4913740-20130628164607/@comment-81.64.26.138-20150927215701

Why is he with skull face and why he later turns on him is actually explained.

HEAVY SPOILERS BELOW

Young Mantis was a conduit that enabled people seeking a great deal of revenge to use his power. Basically he was reverse controlled by those who felt pure hatred and wanted revenge. Because of his past and his yet uncontrolled psychic powers, this revenge trigger was, well, triggered when the plane he was on came on the comatose Big Boss.

He later met the Volgin-on-fire thing and was partly controlled by him to exact revenge against big boss, that's what happens in the hospital. Skull face and mantis didn't meet yet.

Skull face takes control of mantis later (possibly in south africa in the Devil's house ?) and thus takes control of the volgin-hulk thing as well. Finally when Snake is captured by Skull face and brought to the plant where sehelanthropus is kept, Mantis becomes aware of Eli who is in a chopper just above him. The even greater feeling of revenge inside Eli triggers Mantis again who is then set free and let Eli take over his powers to take control of Volgin, eliminate him, and then take control of Sehelanthropus to  eliminate Skull Face and Venom Snake.

The main missing part of MGSV is the end of Venom Snake and Kaz Story (possibly planned in the missing chapter 3). but mantis and Liquid story is well closed with the missing chapter 51 (i just wish we could play it and get the final fight we deserve with all Diamond Dogs assets coming into play).