Kasane Tōdō, the spirited youngest sibling of the Tōdō sisters—flanked by eldest sister Tsumugi and middle sister Koyori—navigates middle school life with infectious cheerfulness. Her reputation as “Fast Ears” stems from a knack for catching whispers and rumors rippling through Yamabiko’s rural lanes, her playful curiosity turning idle gossip into animated exchanges. Light blue hair sweeps across her brow in a side-swept fringe, pinned by a crescent-shaped clip, while amber eyes gleam with lively mischief.

Bound tightly to her sisters, Kasane thrives in their shared dynamic, her friendliness radiating most brightly during interactions with Ayumu Hoshino, a schoolmate and trusted confidant. Though her narrative role spotlights youthful exuberance, official portrayals avoid romantic entanglements, respecting her age—yet her casual remarks occasionally hint at a preference for older boys. No expanded backstory or media roles elaborate further, leaving her essence anchored in these vibrant, unchanging threads.