Gate Keepers 21

What would you like to edit?

Alternative Titles

Synonyms: Gatekeepers 21
Japanese: ゲートキーパーズ21


Type: OVA
Episodes: 6
Status: Finished Airing
Aired: Apr 24, 2002 to Jan 8, 2003
Producers: None found, add some
Studios: Gonzo
Source: Game
Genres: ActionAction, DramaDrama, Sci-FiSci-Fi
Theme: MechaMecha
Duration: 25 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 6.741 (scored by 45574,557 users)
1 indicates a weighted score.
Ranked: #53682
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #6074
Members: 10,601
Favorites: 21

Available At


Ranked #5368Popularity #6074Members 10,601
Add to My List
Episodes: /6


Thirty-two 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 organization 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: ANN)


No background information has been added to this title. Help improve our database by adding background information here.

Related Anime

Characters & Voice Actors


Watanabe, Takashi
Yamaguchi, Hiroshi
Director, Episode Director, Script, Storyboard
Tsuruoka, Youta
Sound Director
Satou, Junichi
Episode Director, Storyboard


Opening Theme

Apple Music
Amazon Music
Youtube Music
1: "Haoto (羽音)" by Junko Watanabe (eps 1-3)
2: "Kyou, Egao ga Areba (今日、笑顔があれば)" by Sakura Nogawa (eps 4-5)

Ending Theme

1: "Kyou, Egao ga Areba (今日、笑顔があれば)" by Sakura Nogawa (eps 1-3,6)
2: "Haoto (羽音)" by Junko Watanabe (eps 4-5)


Jul 27, 2007
It’s a worthy follow-up to the series, but I still like the original series - mostly because I found Gate Keepers to be more serious than the original. This time around things got more morbid too – there was definitely more blood. It’s not like I can’t stand blood (gory I barely gave a chuckle while watching the OVA, whereas the original had me laughing all the time. Also, it’s no longer a harem anime. It’s more of a bishojo anime.

The characters were less charismatic as well. Ayane and Miu were OK, they reminded me of Megumi and Reiko, but the only character I truly ...
Mar 24, 2011
There's a horde of stock alien invaders rampaging about in the city. There's a pack of (more or less) cool girls using superpowers, throwing about deadly cell phones & easily crushing those invaders like small bugs. Six episodes of this ahead.

Is that all? Well, the short answer is: No.

Seeing the genre-eviscerating Madoka★Magica shake the mahou shoujo fandom today makes me wonder even more as to why GK 21, being nine years older and attempting basically the same thing, went barely noticed. Perhaps because no one had expected that a follow-up to a light-hearted shounen/action/adventure/harem series would be a gloomy mahou shoujo deconstruction. Yet it's ...
Nov 25, 2008
I personally thought it was great even though I haven't seen the first Gatekeepers. The characters were connected by their pasts that it made the story better. The art was amazing and seemed very real. I enjoyed watching it.

Interest Stacks

50 Entries · 92 Restacks
34 Entries · 49 Restacks


Recent News

Recent Forum Discussion

Poll: Gate Keepers 21 Episode 6 Discussion
HawthorneKitty - Mar 20, 2010
4 repliesby nomad8 »»
Jul 16, 2021 10:46 AM
Poll: Gate Keepers 21 Episode 5 Discussion
coyote256 - Jun 29, 2010
1 repliesby mitsukuni07 »»
Sep 27, 2012 11:11 PM
Poll: Gate Keepers 21 Episode 4 Discussion
coyote256 - Jun 29, 2010
1 repliesby mitsukuni07 »»
Sep 26, 2012 7:28 AM
Poll: Gate Keepers 21 Episode 3 Discussion
HawthorneKitty - Mar 17, 2010
2 repliesby mitsukuni07 »»
Sep 25, 2012 8:07 PM
Poll: Gate Keepers 21 Episode 2 Discussion
HawthorneKitty - Mar 17, 2010
2 repliesby mitsukuni07 »»
Sep 24, 2012 9:53 PM