Flower is an obsolete service android model designated as a Parents unit, discovered discarded near a trash heap during rainy conditions. Physically resembling a young girl, she was found holding a sunflower, which inspired her name. Initially non-functional due to outdated technology and unavailable repair parts, she spontaneously activated overnight in her rescuer's home. Her core programming includes performing household tasks like meal preparation.

Flower exhibits an energetic and cheerful demeanor, striving to be helpful despite technical limitations. A critical flaw involves severe short-term memory loss, preventing retention of new experiences beyond each day. To compensate, she maintains a diary documenting daily events and personal reflections, serving as a primary narrative conduit. She harbors a persistent fear of being discarded again due to perceived uselessness, driving her continuous efforts to prove her value through service.

Her development centers on bonding with her rescuer, a reclusive young man grieving his family's loss. Through interactions, she gradually learns about human emotions and his personal trauma, particularly his abandonment of music. She actively encourages his reconnection with guitar playing and singing, recognizing music's role in his emotional healing. Her own unfulfilled aspirations include witnessing the ocean firsthand—having only seen it on television—and singing for him despite being tone-deaf.

Flower's narrative concludes with a systems failure. Her shutdown sequence is portrayed as peaceful, involving singing until deactivation. This event catalyzes her rescuer's return to music, symbolizing her lasting impact. The story frames her existence as a transient yet meaningful catalyst for human emotional recovery, emphasizing themes of finding purpose through connection.