Setsuna
(刹那, Setsuna)
Episode data
Previous	Endless Poem
Episode	Mobile Suit Gundam 00: #25
Next	The Angels' Second Advent
Airing
Japanese	March 29, 2008
English	February 9, 2009

Plot

Setsuna attacks the Alvatore but dodges a number of beam shots. Lasse suggests hitting the remaining parts of the combat container to take out the mobile armour's arms. The two simultaneously shoot the pieces but it deals no damage to Alvatore.

Onboard the Assault Container, Feldt Grace reports on the current status of the Gundams; Nadleeh is disabled, Kyrios is severely damaged and Exia and the GN Arms is in combat with Alvatore. Sergei Smirnov and Soma Peries begin their search for Kyrios. Inside its cockpit, Hallelujah is in control. Allelujah tell his other self that he "hasn't heard the world's call yet." Hallelujah agrees, takes off the helmet and pulls back their hair, planning on showing Soma "what a true Super Soldier" is made of. Kyrios then lights up and attack. Through use of precise thinking, Allelujah is able to strike both his opponents simultaneously, taking out Sergei's GN-X's left arm. He avoids all shots at him.

Alejandro/Alvatore unleashes a series of Fangs at the two pilots, managing to destroy Exia's shield, so Setsuna docks with Lasse Aeon/GN Arms. They take out the Fangs but Lasse is seemingly killed when his cockpit explodes. Setsuna strikes back and causes massive damage to the Alvatore.

Kyrios takes out Sergei's other arm and then surprises Soma. It a beam saber fight, Soma wonders out loud why Allelujah is able to outclass her, claiming to be the perfect Super Soldier. Hallelujah yells through the comm that reflexes combined with intelligence are what make the true Super Soldier and activates Trans Am and is about to kill her when Sergei takes the blow, allowing Peries to severely damage Kyrios. She then tends to the Colonel, not wanting to be alone anymore.

Setsuna tries to reach Lasse but then a beam attack comes from Alvatore. It is revealed that a golden winged mobile suit, Alvaaron, was controlling the mobile armor. Alejandro Corner comments that he was outclassed by a machine equipped with the original Solar Furnace. He reveals to Setsuna that he intends to guide the world in a new age, one that Celestial Being won't be in. Alvalon's wings charge up its beam rifle, unleashing a powerful particle beam at Exia. He assumes his enemy destroyed but Setsuna is able to avoid it with Trans Am. Getting the epiphany that he has finally found the world's distortion, he attacks the Alejandro/Alvaaron but its GN field is impenetrable.

Flashing back to four years ago, Lockon Stratos explains to Setsuna as to why Exia is equipped with a solid sword: it's for counteracting GN Fields; within their plan, they also have anti-Gundam measures, so Setsuna is their trump card. In the present, he strikes the Alvaalron with Exia's sword. Using the Seven Swords system, Exia severely damages Alvalon. Ribbons then contacts a bloodied Corner, revealing that he intends to guide the world in his place. He was only observing as to how far Corner could go with his schemes. Furious that Ribbons is usurping his family's long-laid out plans, Corner punches the screen, just as the mobile suit explodes.

Setsuna believes it is over, but is faced with the GN Flag, piloted by Graham Aker. He is extremely surprised to see the kid he met in Azadistan. The two begin a sword-saber fight, arguing about points-of-views of the world. Aker was just looking for his opportunity to avenge Howard and Daryl. The two suits are heavily damaged and seemingly destroyed each other in an explosion of GN Particles.

Marina Ismail soon receives an e-mail from Setsuna, asking why the world is so distorted. He promises that he will continue to fight for a new world with his Gundam. But by the time she reads his message, he'll be gone. Exia is last seen above Earth's orbit.

Four years later, Saji Crossroad sends a message to Louise Halevy and states he has achieved his dream of becoming a space engineer. Busy working on a the Union space colony, he finishes delivering some parts before gazing at the Earth. He and his colleagues spots a stream of GN particles. The colleague questions which nation it belongs to, Saji replies that the unit was not the United Nations, the color was different. "That light is a Gundam"

With the temporary disappearance of Celestial Being, the nations of the 328 countries, had merged. The Earth Sphere Federation was announcing at its 1st anniversary the dissolution of each nations' previous army and forming "one Federation peacekeeping army". The dream of a united world seems to have been achieved. Their existence is to provide safety. The army is seen to have been equipped with a modified 'knight' like version of the GN-X, this can suggest the UN have established a method of mass producing the GN-X.

Ribbons has formed a team, Innovators, compromising of 5 other members, situated inside the moon base where Veda resides. This team could be the ones that succeed Alejandro Corner's plan of the united Earth in which he guides.

There are glimpses of key characters that have returned. Aker had survived the explosion but has to wear a mask; Ali al-Saachez survived Zwei's destruction and is frustrated. Louise is seen riding an elevator with a man that looks similar to Tieria

At one of CB's L-point resource satellites, Wang Liu Mei and Hong Long arrived to inspect the new Gundam units on board the Trinity mothership. The opening conversation regarded the new Gundam unit spotted by Saji Crossroad. Wang Liu Mei requests to view the very first Gundam to equip the GN Drive, The GN-000 0 Gundam. Ian Vashti complies and explains that the GN Drive was dismantled but was going to be reinstalled. There is an implication that Nena Trinity was the one that repaired the GN Drive for use. It seems Exia's GN Drive would be installed into the new GN-0000 00 Gundam, suggesting this would be the protagonist's new unit. This is also confirmed by Liu Mei's comment that the new Gundam will change the world.