Baron, known in Japanese as Danshaku, is a St. Bernard dog and a significant companion to the protagonist Takeshi Onigawara, who operates as the superhero Hurricane Polymar. As Takeshi's pet, Baron is distinguished by being the sole character aware of his owner's dual identity as a costumed crime fighter, a secret not shared with other human characters in the story. In his role within the narrative, Baron serves as a confidant and a silent supporter, recognizing Takeshi whether he is in his civilian guise as a clumsy assistant at a detective agency or transformed into the powerful Polymar. The nature of the dog's personality or any personal motivations are not detailed in available sources, nor is there information about any development the character undergoes. Baron does not possess any notable abilities beyond those typical for his breed. The character appears exclusively in his role as a faithful animal companion, providing a private link to the hero's true identity. No reliable information exists regarding the character's background, motivations, or any significant narrative development.