Height= 5'8" (174cm)
A gunsmith from Warrens City. He appeared in the episode Peace Maker . He fell into despair and depression after he sold a gun to a man who ended up robbing a bank and killing Marlon's wife and child in the process. He turned to drinking and stopped making or fixing guns. When Vash seeks him out asking for him to fix his gun, Marlon remarks that Vash would have to be an idiot to trust a complete stranger with his gun. After watching Vash and the townspeople risk their lives to defend each other, he gave up drinking and took up his profession again.