Maurice "Moira" Brown is a thirty-two year old man. He runs a shop in megaton, which he named, "Craterside Supply". He is known for his quirky attitude, displayed many times he opens conversation with the "Lone Wanderer". He sells a variety of moderate to low condition items. "Craterside Supply" is obviously a reference to the live atomic bomb in the middle of Megaton, showing he may have a sense of humor.
Many believe Moira is a women with a mustache. That is not true, he is a man with breasts. This might be caused by, who knows? Living in a town with an irradiated mas of water and a atomic bomb in the middle?