Denom has been walking around lately looking quite pleased with himself thanks to the mysterious prosperity of the crops. Denom is the mechanic/gardener responsible for maintaining the wind turbine, water makers, and greenhouses.
Denom has not appeared nor is he mentioned in any published game. He was to appear only in Van Buren, the canceled Fallout 3 by Black Isle Studios. It is not certain if he will appear in any future Fallout game.