Bob is a skeleton who lives on the 6th layer of an ancient dungeon. He was previously a human who died of a ravaging plague. He was then brought back to life as a skeleton by Strax, the local evil necromancer; who sought to create an army of undead to protect his sanctuary (the ancient sanctuary). But Bob hated being bad and refused to kill innocents. So he strayed away from the other skeletons in the dungeon and settled in the 6th layer, enjoying the brief company of each passing adventurers.