Ep. 25: Setsuna battles Alejandro in GN Arms, unites with Hallelujah, and faces Graham after defeating Ribbons' mastermind.
Setsuna fights Alejandro in the GN Arms while Exia destroys the mobile armor, though the GN Arms is also lost. Allelujah merges with Hallelujah to confront Sergei and Soma’s GN-Xs, only to recognize Soma as Marie. Alejandro reappears in the golden Alvaaron, but Setsuna uses Exia’s seven swords and Trans-Am to defeat him. Before the Alvaaron explodes, Ribbons admits to being the true mastermind behind the plot to stop Celestial Being. Graham arrives in a GN Drive-equipped Flag to battle the weakened Exia. The two pilots exchange views on Gundams and the world, ending by stabbing each other’s suits, which destroys the Flag and damages Exia. Meanwhile, Marina reads Setsuna’s letter about the world’s state. Four years later, in 2312, engineer Saji sees a faint Gundam light in space.
Episodes
- Ep. 21 · Saji mourns his sister while Trinity attacks and UN assaults Celestial Being in space
- Ep. 22 · Lockon recovers while UN Army launches Operation Fallen Angel against Gundams.
- Ep. 23 · Dynames crew repairs ship and uses Trans-Am to fight UN forces after Aeolia's trap
- Ep. 24 · Setsuna mourns Lockon while Celestial Being faces overwhelming attacks from Sergei and Alejandro Corner.
- Ep. 25 · Setsuna battles Alejandro in GN Arms, unites with Hallelujah, and faces Graham after defeating Ribbons' mastermind.