Horrorman is a ghost-themed character created by Baikinman specifically to steal Anpanman's head as part of a ghost ship scheme. He possesses spectral abilities including flight, intangibility, and the power to create ghostly illusions used to frighten Anpanman and his friends while carrying out Baikinman's orders.

A pivotal moment occurs when Horrorman is injured. Despite being his enemy, Anpanman selflessly offers a piece of his own bread head to nourish Horrorman and aid his recovery. This unexpected act of kindness deeply affects Horrorman, causing him to question his allegiance to Baikinman. Moved by Anpanman's compassion, Horrorman switches sides.

He actively assists Anpanman and his allies in the final confrontation against Baikinman and the ghost ship. Horrorman deploys his ghostly powers to aid the heroes, directly contributing to their victory and the defeat of the ghost ship threat, signifying his complete transformation from antagonist to ally. His character arc begins and concludes within this specific narrative.