Gate Keepers 21

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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, MechaMecha, Sci-FiSci-Fi, ShounenShounen
Duration: 30 min. per ep.
Rating: PG-13 - Teens 13 or older


Score: 6.791 (scored by 40424,042 users)
1 indicates a weighted score.
Ranked: #43992
2 based on the top anime page. Please note that 'Not yet aired' and 'R18+' titles are excluded.
Popularity: #4837
Members: 9,205
Favorites: 23
Ranked #4399Popularity #4837Members 9,205
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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)


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Characters & Voice Actors


Watanabe, Takashi
Yamaguchi, Hiroshi
Director, Episode Director, Script, Storyboard
Tsuruoka, Youta
Sound Director
Kigami, Yoshiji
Episode Director, Storyboard, Animation Director


Opening Theme

#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
jet2r0cks (All reviews)
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 read more
Mar 24, 2011
Forion (All reviews)
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 read more
Nov 25, 2008
Sanada-Sasuka (All reviews)
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.

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Recent Forum Discussion

Poll: Gate Keepers 21 Episode 6 Discussion
HawthorneKitty - Mar 20, 2010
3 replies by syncrogazer »»
Jul 18, 2019 7:14 PM
Poll: Gate Keepers 21 Episode 5 Discussion
coyote256 - Jun 29, 2010
1 replies by mitsukuni07 »»
Sep 27, 2012 11:11 PM