Koto Ootsuki

As Eiji’s childhood friend, this playful and mischievous individual adopts a protective, older-sister persona while frequently teasing both Nanako and Eiji. Beyond her witty antics, she serves as a reliable mentor, offering heartfelt guidance whenever Nanako seeks advice. When she isn't hanging out with her close friends, she focuses her leadership skills as the dedicated president of the Modern US Army Combative club.