Giyu Tomioka (冨とみ岡おか 義ぎ勇ゆう, Tomioka Giyū?) is a major supporting character of Demon Slayer: Kimetsu no Yaiba. He is a Demon Slayer of the Demon Slayer Corps and the current Water Hashira (水みず柱ばしら, Mizu Bashira?).