Rumi Tsurumi

Rumi Tsurumi is an elementary schooler whose composed and detached demeanor sets her apart from her peers. She first crosses paths with the Service Club during a summer forest camp, where she finds herself ostracized by her classmates. Her quiet solitude resonates deeply with Hikigaya Hachiman, who recognizes a kindred spirit in her. After Hachiman intervenes by dismantling the social clique isolating her, Rumi remains a loner—but is no longer a target. She reappears at a Christmas event, demonstrating a level of insight and self-reliance that far exceeds her age.