Skullomania (スカロマニア?) is the secret identity of Saburo Nishikoyama (西小山 三郎 Nishikoyama Saburō?), a third-rate businessman from Tokyo who works to support his wife and children. He adopted his superhero identity when a client asked him to dress-up and pose for a superhero attraction at his department store. Donning a full-body suit resembling a skeleton, Skullomania decided to fight evil for real as a hobby. His costume is later redesigned, with the addition of a red scarf and a red letter "S" in front of his mask.