Kokone Takatsu is an A7M3 production android serving as a courier for the Musashino Delivery Service in the remnants of Musashino, Tokyo. Her first encounter with Alpha Hatsuseno occurs during a package delivery containing a camera and a message from Alpha's owner, marking the inaugural meeting between two robots and igniting a profound friendship. Kokone displays a reserved, shy, and intellectually inclined personality. Her courier role exposes her to more human interaction than Alpha experiences, occasionally enabling her to blend in as human. Functionally distinct, she cannot process animal protein. Over time, Kokone develops romantic feelings for Alpha, fueling her curiosity about their origins and prompting investigations into historical records of earlier robot models like the A2M1-4 units. Her relationship with fellow robot Maruko Maruko begins with jealousy and tension due to Maruko's possessiveness and Kokone's affection for Alpha, but matures into mutual understanding and cooperation through shared experiences. Kokone's evolution centers on emotional growth, transitioning from a dutiful yet reserved android to one actively exploring relationships and existential questions about robot identity and legacy. Her research into robot history and human artifacts reflects the series' thematic focus on memory and succession.