Horrorman is a skeleton character who typically resides with Baikinman, motivated by an infatuation with Dokin-chan, though his participation in their villainous activities is inconsistent. His appearance is skeletal, featuring consistently visible teeth and a long, tattered purple shirt adorned with a pair of crossed bones on the chest, with notably protruding kneecaps and cheekbones.

Despite his frightening exterior, his personality is happy-go-lucky and clumsy. He enjoys scaring people, but his deliberate attempts usually fail; his successful scares tend to occur accidentally. He is often nice to others but displays a concurrent lack of concern for hurting their feelings. His speech pattern frequently includes the word "hora" as an exuberant call for attention.

His primary relationship is a persistent, unrequited obsession with Dokin-chan, leading him to perform actions like picking flowers and finding food for her to gain favor. Dynamic interactions with other characters are not thoroughly documented, though a general acceptance by others is suggested despite occasional mischievous behavior such as rifling through a space alien's clothes.

A notable ability involves using the bones on his shirt as projectile weapons by removing and throwing them as boomerangs.

Background details are ambiguous and not consistently established. His first animated appearance was in the 1991 film "Soreike! Anpanman: Tobe! Tobe! Chibigon," where he acted as a mentor to Chibigon, a role specific to that movie's canon. An unreliable narration from the character Horako in a 2007 film short suggested a possible past as a prince. Other speculative, non-canonical theories propose a former existence as a shinigami who lost his memories during a period when Earth was lifeless, prior to its revival by the "stars of life." A brief scene in a Christmas special featured the character present in an underground ghost town inhabited by spooky creatures, though no further context was provided.