Posuka Demizu (Japanese: 出水 ぽすか, Hepburn: Demizu Posuka) is a renowned Japanese manga artist, illustrator, and designer, celebrated for her striking artwork in the acclaimed manga series The Promised Neverland. Born on January 17, 1988, in Tokyo, Japan, she has become a prominent figure in the manga industry.

Her career took off with the debut as a manga artist in the 2013 CoroCoro Comic series Oreca Monsters Adventure Retsuden. She has also ventured into the world of illustration with a collection of her works published in The Art of Posuka Demizu Pone and Postcard Planet, released in 2016 and 2021, respectively, by PIE International. Her collaboration with Kaiu Shirai on The Promised Neverland has garnered her international fame and recognition for her artistic talents.