Yuriko Shinonome

As the spirited and mischievous younger sister of Chiharu, this short-haired prankster thrives on teasing Densuke. Although she is well aware of the romantic bond between her sibling and Densuke, she delights in seeking his attention through bold, physical antics, such as jumping onto his face. Driven by a playful rivalry over her smaller bust, she often teases Chiharu, though her own physical vulnerabilities, specifically regarding her backside, eventually become a known weakness in their chaotic interactions.