Grit Jones is the character Stephen plays throughout the Fallout 4 Let's Play. His wife, his story, and he himself are created entirely by Stephen and the guidance given by the Comment Section.
Throughout the story of Fallout 4, Grit has displayed a curious obsession with Hard Hats, Rib Cages as well as short-term obsessive phases with other miscellaneous objects.
He is very charismatic, and has been known to use his "Charm Speak" to his advantage time and time again... especially, and to great effect, with the ladies (if ya know what I mean).
*update image when needed
**for Stephen's view of Grit's personality, see 7:25. [PS: might be spoilers]