Mobile Suit Gundam SEED A.T.C.

"War never ends... unless you fight!"

- Tagline

Mobile Suit Gundam SEED A.T.C. is a side story of Gundam SEED. It follows the story of Edgar Williams and his sister, Aera Williams.

Plot
Prologue:

It takes place of C.E. 71, which follows the story of two siblings, which are ZAFT members. It starts during Episode 8 of Gundam SEED. After Edgar and Aera's parents died because of a battle, they have to pilot a two-seater Gundam. Named the ZGMF-X70H Eidolon Gundam. This is what appeared at the screen:

Generation Unrestricted Network Drive Assault Module '''G.U.N.D.A.M _Ver.2.5.3 Rev.07_

Z.A.F.T'''

This means, the Eidolon was from ZAFT, since they are members of ZAFT, they can pilot it.

Story

Ryouga Zala ( Athrun's younger brother) and Rune Joule (Yzak's younger sister), are also coordinators, but from the Earth Alliance Force. Ryouga piloted the Strike Noir (before Sven Cal Bayang did) and Rune piloted the Blu Duel (before Mudie Holcroft). There was a fierce battle, Ryouga destroyed the Eidolon. Edgar survived the attack, but Aera was killed. Ryouga has tears flowing down his cheeks, this speculated that he and Aera might have been in some form of romantic relationship due to his rather extreme change in personality following her death.

Edgar's calm demeanor was replaced by great rage after witnessing Aera killed in combat. Aera's death flashed before his eyes, now it fills him more rage. When he saw Athrun and Nicol talking, he said "It reminds me of Ryouga... killing Aera!". At last, the battle was over. But it doesn't erase the rage inside Edgar. He remembered what Aera said, "More rage cause you more pain." At last he stopped the rage and learns his sister was with him always and forever.

Characters

 * Edgar Williams (エドガー·ウィリアムズ, Edogā· Uiriamuzu) - 18 years old, the main protagonist. After his sister, Aera Williams, was killed in combat, he vows to have revenge.
 * Aera Williams (アエラウィリアムズ, Aera Uiriamuzu) - 16 years old, Edgar's sister. After her brother, Edgar Williams, witness her killed in a battle, he vows to have revenge.
 * Ryouga Zala (量がざぁ, Ryōga Za~a) - 14 years old, Athrun's younger brother and Patrick Zala's youngest son. After killing Aera, it was revealed that Ryouga and Aera have been in some form of romantic relationship.
 * Rune Joule (ルーンジュール, Rūn Jūru) - Yzak's younger sister and Ezalia Joule's youngest daughter.