Due to the injury on the right side of Graves' face and his ear, it left him a little deaf on that side.

Working alongside him for 4 years, you always took it upon yourself on missions to stand on his right side, as his extra source of hearing. Whenever you heard something to the right, you'd let him know by telling him.

It was a small act - and no one knew why you did it - but the small act of always meant to the world to your Commander, so much so he promoted you to his second-in-command.