Gate Keepers 21 poster
OVA Finished Spring 2002

Gate Keepers 21

ゲートキーパーズ21

Action Drama Sci-Fi
★ 6.2AniList score
6Episodes
30 minPer episode
Video GameSource

32 years have passed since the initial defeat of the Invaders. A.E.G.I.S is all but dismantled now and has become an underground organiziation consisting of only a few Gate Keepers left to save humanity. One of the members,… Read more

Storyline

32 years have passed since the initial defeat of the Invaders. A.E.G.I.S is all but dismantled now and has become an underground organiziation consisting of only a few Gate Keepers left to save humanity. One of the members, Ayane Isuzu, is sick of society as a whole, though she continues to defeat the Invaders out of spite for her father. Suddenly, she learns of the revival of Machine General (Kikai Shogun) and Devil Count (Akuma Hakushaku), but a mysterious ghost girl now accompanies them. It is up to Ayane and the remnants of A.E.G.I.S to stop them and save humanity once again. (Source: Anime News Network)

Characters & Japanese Voice Cast

Miu Manaduru Miu Manaduru Main VA: Yukiko Hanioka
Ayane Isuzu Ayane Isuzu Main VA: Ikue Ootani
Satoka Tachikawa Satoka Tachikawa Main VA: Sakura Nogawa
Yukino Houjou Yukino Houjou Supporting VA: Masami Suzuki
Reiji Kageyama Reiji Kageyama Supporting VA: Tomokazu Seki
Ghost Girl Ghost Girl Supporting VA: Mamiko Noto
Naoko Itou Naoko Itou Supporting VA: Naoko Takano
Chinami Watanabe Chinami Watanabe Supporting VA: Chinami Nishimura

Seasons & Related Anime

PrequelGate Keepers TV Series · 2000

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Frequently Asked Questions

How many episodes does Gate Keepers 21 have?

Gate Keepers 21 has 6 episodes.

Facts from AniList (also listed on MyAnimeList); streaming availability from JustWatch India. Last updated 17 October 2026, 8:46 AM IST. Episode times are Japan broadcast times shown in IST. Spotted a mistake? Write to [email protected].