The man who started it all. Or at least a clone of the man who started it all.
Raiden learned from Big Mama, in exchange for the location of Big Boss that he obtained from GW, that Olga's daughter, Sunny, was being held in Area 51, and successfully rescued her with the help of Big Mama and the Paradise Lost. After hearing of Rosemary's miscarriage and subsequent remarriage to Roy Campbell, Raiden became despondent. He left Sunny in the care of Otacon and Snake, then began work on retrieving Big Boss's remains from the Patriots for the Paradise Lost Army, leading to his capture.
As a prisoner, the Patriots used Raiden as a test subject for experiments in exoskeleton enhancement surgery, during which he had his head and spine excised from his body from his lower jaw down and subsequently grafted into an enhanced synthetic body.
It was there in his captivity within the Patriots grasp that he had discovered the remains of Big Boss; Along with what looked like two more clones of the Legendary soldier. They're tanks baring code names on both... "Big Chief" and "Boss+."
Now in the present, Raiden does not seem to recall seeing the two clones tanks or chooses not to explain the horrible events he experienced. When the mother AI was destroyed by Snake in 2014, the real Big Boss was released. And shortly afterward s both Big Boss and Major Zero died from the FOXDIE Solid Snake carried in him...
He was left to live out the rest of his life in peace. Not knowing that during those moments, both 3rd generation clones of Big Boss were released from they're tanks and trained to become the next generation of perfect soldiers...
..........The Twin Snakes lived on once more.
I am one of two, I follow in the footsteps of my father and model myself from the Solid examples of my older brother. I am Boss+.
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