Horrorman recurs throughout the franchise, featuring in productions like "Soreike! Anpanman: Rhythm de Utaō! Anpanman Natsu Matsuri". He appears as a skeleton wearing a long, tattered purple shirt emblazoned with crossed bones on the chest. His physical traits include protruding kneecaps, prominent cheekbones, and an ever-present set of teeth forming a skeletal grin.

Contrasting sharply with his frightening form, he exhibits a happy-go-lucky, clumsy, and generally goofy personality. He demonstrates a willingness to be kind, though he often unintentionally hurts feelings through his actions. He enjoys attempting to scare people, but these deliberate efforts usually fail. Ironically, he frequently startles others purely by accident due to his inherent nature. He often peppers his speech with the word "hora".

His background remains largely undefined. His first animated appearance was in the 1991 movie "Fly! Fly! Chibigon", mentoring Chibigon, though this role is specific to that film's continuity. A claim by the character Horako in a 2007 short film suggested he was once a prince, but this information's reliability is uncertain. Scenes in an underground ghost town inhabited by spooky creatures show his association with such entities.

He utilizes the crossed bones on his chest as detachable boomerang weapons, known as the Bone Boomerang. His relationships are complex; he harbors a persistent, one-sided romantic obsession with Dokin-chan, constantly trying to impress her by gathering flowers and food. He often resides with the primary antagonist, Baikinman, and assists him due to this infatuation. However, he does not consistently align with their villainous schemes, indicating an ambivalent association rather than full commitment to antagonism.

His portrayal in "Soreike! Anpanman: Rhythm de Utaō! Anpanman Natsu Matsuri" aligns with these established franchise characteristics.