Andō Niina, a 15-year-old human with blood type B, navigates dual lives as a first-year student at Kokusai Academia and a rising idol singer. Her combat role centers on piloting the Nina Robo, a support mecha constructed from extraterrestrial meteorite alloys. This unit merges with a larger robot through magnetic laser synchronization, unlocking flight systems and armaments like energy sabers, shock-ribbon projectiles, and missile batteries.

During missions, Nina Robo’s integrated microphone allows vocal performances mid-battle, while its shuriken launchers and autonomous flight protocols enhance tactical versatility. The unit docks within the primary mecha’s core, enabling seamless transitions between aerial maneuvers and synchronized weapon deployment.

Documented records omit her familial ties, personal history, and relational dynamics. Her psychological trajectory, driving motives, and potential evolution remain unexplored in existing archives. Her sole confirmed narrative engagement occurs within a 1993 OAV, with no extensions into subsequent media or franchise expansions.