The Sky (Azure)
The four pilots all reunite and defeat Idun together. Meanwhile, Tsubaki struggles with her emotions at leaving to synchronize with the island core. Kazuki, with the help of Akane, manages to rescue Soushi, bearing the assimilation. As the Meir begins to make its way to the atmosphere, Maya snipes at it, preventing it from spreading all over the world. Tsubaki has become one with island, as she dissolves into thin air. Idun, barely alive in the Fafner Mark Nicht, hinders Kazuki and Soushi from leaving the battlefield, but Koyo is able to save the two. On their way to the island, Soushi vanishes because of his near assimilated state.
Aired 26/12/2004EP 25 - The Sky (Azure)
Fafner
Tatsumiyajima is the central island in the middle of a small cluster of islands, in a sleepy backwater of the Japanese isles. Not much happens there, and the island's young people go to school knowing that their lives are likely to remain peaceful and undisturbed. Or so they have been taught... but the truth is different. The fate of mankind is on the line, and Tatsumiyajima is the last line of defense against a hostile and incomprehensible enemy. At the center of it all, fighting for Humanity's continued existence, is the giant robot Fafner, the dragon that guards this final treasure of mankind.
(Source: Anime News Network)
Note: The last episode aired with a runtime of ~48 minutes as opposed to the standard 24 minute long episode. In the DVD release and subsequent home video releases of the series, the final episode was split into two separate ~24 minute long episodes.