Baron, an aging St. Bernard with a retired police dog pedigree, serves as Joe Kuruma’s companion while retaining sharp instincts from his law enforcement career. Though capable of articulate speech, his communication remains unintelligible to humans—a limitation fueling recurring frustration after he alone witnesses Takeshi Yoroi’s transformation into the superhero Polymar during the Musasabi Party crisis. This unspeakable secret strains his dynamic with the detective agency, juxtaposing his dutiful loyalty with dry, internalized critiques of Joe’s bumbling methods and his own overworked status during investigations. His pragmatic realism surfaces through case-solving contributions informed by years of police training, while paradoxical empathy emerges in pivotal moments: comforting an unconscious Takeshi in freezing conditions and later orchestrating the hero’s rescue during the series’ climax. These actions underscore a layered persona—simultaneously sardonic yet compassionate, weary yet observant—that quietly critiques human foibles through silent glances and muted exasperation, cementing his role as the narrative’s most perceptive, if unheard, voice.