Gregory Mouse is the mysterious and unsettling proprietor of Gregory House, the eerie hotel at the center of the 'Gregory Horror Show' anime series. Serving as the main antagonist and host, Gregory guides lost souls—often the guests—through bizarre, nightmarish experiences that reflect their own inner darkness. With a polite yet sinister demeanor, Gregory’s actions blur the line between helping and tormenting his guests, making him a symbol of the psychological horror and surrealism that defines the series.