The Old Friend(black lagoon x male reader)

the 3 feared women of the earth were about to be execute until a figure came to there rescue but this figure had a gas mask on him and also most of the time they see the same figure as well so they decided to recruit him but everytime they try people try to assassinate him. But the women's began to think that the figure could be someone that they know way back. Will they find out or will a bullet find out.