Horrorman's documented character details derive from other media appearances, not the film "Soreike! Anpanman: Yumeneko no Kuni no Nyanii". Sources reference a 2007 film where Horako claims Horrorman was once a prince, presenting this as potentially unreliable information. His established traits include a clumsy personality, a bone boomerang ability, and a relationship with Dokeen. These elements lack connection to his role or involvement in "Yumeneko no Kuni no Nyanii", leaving his appearance and activities in that specific movie unaddressed by the available materials.