Tarou, Sonoko Tanabe's Golden Retriever residing next door to Subaru Mikazuki and Haru, sports a gold-and-cream coat and a black collar with a circular metal tag. His inherently friendly and sociable nature drives him to seek companionship with both humans and animals, exemplified by his notable interspecies friendship with Haru the cat. Tarou demonstrates perceptive intelligence, learning the purpose of veterinary visits after experiencing relief from an injured paw. His role within the narrative is supportive, fostering community interactions near Subaru's residence and occasionally joining neighborhood activities alongside fellow pets like Haru, Hachi, and Roku. His portrayal remains a benevolent and stable presence within the story's environment.