Demizu, Posuka, 1988- (Personal Name)

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Shirai, Kaiu. The promised Neverland, 2017: title page (art, Posuka Demizu)

Yakusoku no neverland wiki website, Feb. 21, 2018: (Posuka Demizu = 出水 ぽすか; Japanese manga artist; female; born Jan. 17, 1988)