Gaap is a demon and one of the 72 demons of the Goetia, appearing as a key character in the visual novel series 'Umineko no Naku Koro ni'. She is the demon summoned by Beatrice and serves as her subordinate. Gaap is known for her playful and mischievous personality, as well as her powers to manipulate space and create portals. Her role often involves supporting Beatrice in various magical battles, providing both comic relief and formidable opposition to the protagonists.