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Kyuta Sakai (坂井 久太, Sakai Kyūta, born June 11, 1976) is a Japanese animator, character designer, and illustrator from Niigata Prefecture. She is also credited under the names Kumiko Sakai (坂井久美子, Sakai Kumiko) and Koume Aoi (あおい小梅, Aoi Kōme).