Mister Oh is the Unknown Ghoul, a ghoul who entered Death Valley with no living life file which means his original dimension and nature of death is, well, unknown. While scared of most new things, Mister Oh is a brilliant problem solver, conjuring up ingenious solutions to problems, sometimes by accident! Despite this, Mister Oh tends to die repeatedly in Death Valley, sometimes spending years upon years laying in a coffin in the ground. So he is smart, but stupid regularly as well.