Qu-0213 Ay-baba is one of the four personalities that make up the robot Qu-0213 in the anime Bullet/Bullet. Qu-0213 is a small red-and-black robot with an oblong head and oversized arms, and its computerized face changes color to indicate which personality is active; Ay-baba is represented by the color yellow. She is a kind-hearted grandmother figure and the most gentle and nurturing of the four personalities, which also include Nosa, Kau, and Naka.

In the daily life of the group, Ay-baba is responsible for cooking, and her defining trait is the remarkable speed with which she prepares delicious meals for the team. Her warmth and care give her an elder-like presence within the shared body and within the crew, which includes the young thief Gear and the gambler Shirokuma. Together with her fellow personalities, she takes part in the group's work in a ruined near-future world, helping recover items that were unjustly taken while the team is pursued by dangerous killers. Because Qu-0213 operates as a single unit, Ay-baba is most visible in the group's quieter moments, and her development is tied to the collective journey of the whole crew rather than to a separate story of her own. Her abilities include the physical strength and endurance of the Qu-0213 body, but her signature skill is her extraordinarily fast cooking, which provides a constant source of comfort and support for the team.