Despite being seen fighting on the battlefield at various times alongside the Naturals military organization the Earth Alliance, Cagalli is later revealed to be the daughter of Uzumi Nara Athha, the leader of the neutral country of Orb.

[5] She reappears when ZAFT's Andrew Waltfeld destroys the town of Tassil, forcing her and her comrades from the Desert Dawn to chase after him.

[13] When the Earth Alliance under the direction of Blue Cosmos attacks Orb, Cagalli's father gives her a photograph of her and Kira when they were babies revealing that they are twins.

Cagalli then escapes on board the Kusanagi as her father and the other Orb leaders sacrifice their lives by self-destructing the Kaguya mass driver in order to prevent it from being used by the Earth Alliance.

[17] She is accompanied by Athrun, who acts as her aide and bodyguard,[18] on a diplomatic mission to the PLANT's where she meets with Chairman Gilbert Durandal to discuss matters regarding increased militarization.

[20] Cagalli realizes her mistake and from the Archangel attempts to reason with Orb's military forces in an effort to stop them from fighting against ZAFT.

[22] When the Archangel returns to Orb, it is under attack by ZAFT and Earth Alliance forces seeking the sheltered Lord Djibril, leader of Logos.

73 Δ Astray Cagalli meets a team from Mars during their visit to Orb but disappears when she is kidnapped by Kira during the events of Gundam SEED Destiny.

[46] A similar comment was made by Ross Liversidge from UK Anime Network who praised Cagalli's return in the series due to the fact the importance from her role was found "unexpected".

[47] Writing for Mania, Chris Beveridge also liked Cagalli's involvement in the series citing her experience in combat as well as a romantic triangle that appeared to be between her, Kira and Flay Allster.

[48] In a later episode, Wolstenholme found that Cagalli's character had become more mature when she confronts Athrun about the reasons to kill somebody following her father's teachings, citing it as a strong quiet moments from the series.

[51] According to the website Real Sound [ja] the couple Cagalli and Athrun is highly popular and the film Gundam Seed Freedom alongside its novelization cheered up the fans thanks to its focus on them and this can be explored further more as parallel to Kira and Lacus.