Sumire Yamanashi

Sumire Yamanashi is introduced as a tenant of Sunohara-sou and serves as the Vice President of the Tanacho Middle School Student Council. Despite her composed and refined appearance that exudes maturity, she harbors a deep fondness for all things cute and holds an intense admiration for Student Council President Yuzu Yukimoto. She often takes on a nurturing, older-sister role toward Aki, though she never regards him romantically. This striking contrast between her cool exterior and warm inner world makes her a quintessential gap-moe character.