Chuntaro

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Zenitsu Agatsuma's Kasugai messenger animal — a sparrow rather than a crow, and the sole survivor of his family after a demon attack — who delivers Zenitsu's mission scrolls.

A small brown sparrow, notably smaller than the crows assigned to other Demon Slayers.

Silent and unable to speak like the Kasugai crows, but devoted and always close to Zenitsu; his real name, Ukogi, comes from his favorite food, though Zenitsu nicknamed him Chuntaro before learning it.