Brutus is A member of The Agency and was part of team S.H.A.D.O.W. He wears A cool suit and normally sunglasses but both his S.H.A.D.O.W. and G.H.O.S.T. forms are lacking the cool shades. He was the main boss at The Grotto, and he had A minigun to call his own. Brutus during the gap between season 2-5 became a weapons dealer for both SHADOW and GHOST and became 1/40 npcs to spawn on the island, he always spawns at Dirty Docks and will tell the player to fish or upgrade weapons, he is also one of the npcs to give bounties so talk to him B)
After the zero point became the spire Brutus is no where to be seen on the island, seems he fucked off from the story for now...
Oh yeah and Jules calls him a traitor.
He has a beach episode version him so this means that he went to relax before going back to work. so cool i guess.