Paladin Gunny

Paladin Gunny is a Brotherhood of Steel Paladin stationed at the Citadel. He can be found in Ring A just outside the lab in the council room, outside in the courtyard training recruits during the daytime, or inside a dormitory in Ring A. He can also disappear for periods of time. Whether if that's a glitch or he goes outside for a "walk", it is not certain.

He can give the Vault 101 Dweller Power Armor Training.

Permission must be granted by Elder Lyons before Gunny will provide the necessary training.

"Gunny" is a common nickname for United States Marines holding the rank of Gunnery Sergeant.

The line he says about relax your muscles when you receive Power Armor Training is a reference to the novel Starship Troopers by Robert A. Heinlein. The narrator uses the same line to describe how soldiers in the Mobile Infantry are trained to wear power armor.

His job in the Brotherhood is to train new recruits and he is not overly happy that the Vault 101 Dweller gets Power Armor Training without any work involved.

it is very hard to find him it took me an hour :[