Hachi

As the adorable Tuxedo cat belonging to Nana, this charming pet plays a central role in the daily lives of the series' main cast. Beyond his cute appearance, he shares a deep familial bond with Haru, acting as the younger brother in their unique relationship. His presence adds a layer of warmth and companionship to the unfolding drama, making him a beloved companion within the heart of the story's emotional landscape.