Lasty Farson, codenamed Angel Rabbie, is a 16-year-old angel trainee from the lunar city of Sosarium, marked by heterochromatic eyes and a perpetually clumsy, disorganized nature. Her daily struggles with punctuality and preparedness starkly contrast her empowered persona: as Angel Rabbie, she gains heightened competence and resolve, battling threats such as rogue war-era robots and opportunistic factions capitalizing on post-war instability.

Raised in the holy city of Fontille, her journey begins when the mystical cat spirit Saaria Wynes leads her to a concealed corridor. There, the angel Stephanie bestows her with a magic wand, tasking her to thwart Neo-Beranneed—a clandestine group seeking to resurrect a fallen kingdom by stealing the sacred relic "Angel’s Wing." Balancing her innate gentleness with her duty as a peacekeeper, Lasty allies with figures like Lukia Shawl, a fellow angel once believed dead, whose unpredictable motives add complexity to their missions.

Her arc emphasizes growth, pivoting between her inept human self and her capable angelic form. Clad in vibrant magical-girl attire, she navigates rookie trials against adversaries and self-doubt, her story anchored in early challenges as she grapples with responsibility and latent power. Limited by her series’ concise scope, her narrative remains centered on these foundational struggles, underscoring her evolution from hesitant novice to determined guardian.