Koharu Shirahane

Koharu Shirahane is a heartwarming and energetic supporting character who brings warmth and comic relief to the story. As the younger sister of Yukina Shirahane, she lives alongside her sibling at their uncle's temple. Despite being only in third grade, Koharu harbors an unusually deep passion for historical dramas that far exceeds what one might expect from a child her age. When the time-traveling samurai Kennosuke arrives in the modern world, Koharu embraces him without hesitation, naturally bridging the gap between past and present. She frequently takes advantage of his unfamiliarity with contemporary culture to pull playful pranks, making her a lively and beloved presence throughout the series.