Grey is a main-character, who's role also doesn't become as relevant until about halfway through the story. He's very invested in East and is East's main support in his journey through-out the story. Grey has a bit of a complicated life, but unlike some of the other characters, most of his struggles have been processed already, and doesn't particularly affect him to a great degree, outside of occassional annoyance/frustration.

Grey is definitely a very assertive, dominating character, and I imagine the confidence in his vocal presence and general presence would absolutely come off. I imagine Grey specifically to have a pretty deep voice, but as with all of the characters, I'm interested in hearing anyone's interpretation, so feel free to give it a shot, even if your voice isn't deep!