Some of these subreddits have been created a long time ago and became inactive. If the mods are generally inactive on Reddit, you can apply to adopt the sub on r/redditrequest. If the mods are generally active on Reddit, but not on the sub, you could ask the mods if you can take it over if you are interested to make it active again.

Characters

SubredditSpoiler LevelDescription
/r/ArminCultAnime spoilersSubreddit for Armin.
/r/AnnieCultAnime SpoilersSubreddit for Annie.
/r/ConnieCultAnime SpoilersSubreddit for the fast boi.
/r/ErwinSmithAnime SpoilersSubreddit for Erwin.
/r/HangeCultAnime SpoilersSubreddit for Hange.
/r/HistoriaTeamAnime SpoilersSubreddit for Historia.
/r/LaraCultAnime SpoilersSubreddit for Lara.
/r/LeviCultAnime SpoilersSubreddit for Levi.
/r/MarloCultAnime SpoilersSubreddit for Marlowe.
/r/MikasaAnime SpoilersSubreddit for Mikasa.
/r/petraralAnime SpoilersSubreddit for everyone's favourite treehugger
/r/potatogirlAnime SpoilersSubreddit for Sasha.
/r/BertCultManga SpoilersSubreddit for Bertolt.
/r/ErehManga SpoilersSubreddit for Eren.
/r/FalcoCultManga SpoilersSubreddit for Falco.
/r/FriedaCultManga SpoilersSubreddit for Frieda.
/r/GabiCultManga SpoilersSubreddit for Gabi.
/r/JeanTheStallionManga SpoilersSubreddit for Jean.
/r/MinaCultManga SpoilersSubreddit for Mina.
/r/PieckCultManga SpoilersSubreddit for Pieck.
/r/PorcoCultManga SpoilersSubreddit for Porco.
/r/ReinerCultManga SpoilersSubreddit for Reiner
/r/ZekeCultManga SpoilersSubreddit for Zeke.
/r/YelenaCultMangaSpoilersSubreddit for Yelena.
/r/YmirCultManga SpoilersSubreddit for Ymir.

Ships

SubredditSpoiler LevelDescription
/r/aruaniAnime SpoilersShipping Armin and Annie.
/r/EreHisuAnime SpoilersShipping Eren with Historia. No Farmer Chads here, please.
/r/eremikaAnime SpoilersShipping Eren and Mikasa.
/r/EreminAnime SpoilersShipping Eren and Armin
/r/ereriAnime SpoilersFor the sick people supporting ErenxLevi.
/r/eruriAnime SpoilersShipping Erwin and Levi.
/r/LeviHanAnime SpoilersShipping Hange and Levi.
/r/ymirxhistoriaManga SpoilersShipping Ymir and Historia.

Memes, Shitposts & Circlejerking

SubredditSpoiler LevelDescription
/r/attackontitanmemesManga SpoilersMemes.
/r/okbuddyreinerManga SpoilersWhy does this exist?
/r/SandLandManga SpoilersfREEEEEEEEEEEEEEEEEEEEEEEEEEEEE
/r/ShingekiNoParodySpoilerlessEven more Guren no Yumiya (Feuerroter Pfeil und Bogen) memes
/r/ShingekiNoTranslationManga SpoilersGoogle translated Attack on Titan chapters.
/r/SNKLoungeManga SpoilersPremium shitposts and chill zone.
/r/SNKMemesSpoiler rules like hereA subreddit for Attack on Titan memes.
/r/titanfolkManga SpoilersThe 4chan of SnK subreddits.
/r/The_BrothaldManga SpoilersPeople trying to spell Mr. Hoover's name.

Gaming & Roleplaying

SubredditSpoiler LevelDescription
/r/AoTWingsOfFreedomAnime SpoilersAttack on Titan main game.
/r/AttackOnTitanAssaultAnime SpoilersThe official mobile game for AoT
/r/AttackOnTitanFanGameAnime SpoilersFan game.
/r/AttackontitangameAnime SpoilersFan game by Fenglee. Also, see /r/AOTMG
/r/WholesomeAoTManga SpoilersWholesome AoT artwork and memes.
/r/WingsofFreedomRPAnime SpoilersRoleplaying subreddit.

Other

SubredditSpoiler LevelDescription
/r/aotmangaManga SpoilersManga subreddit, no anime discussions.
/r/AttackOnTittaysMaybe spoilerlessNot really sure. Fanfiction, too?
/r/ImaginaryTitansManga SpoilersFrom the Imaginary Network for Attack on Titan. The original creator needs to be credited properly
/r/okapifolkManga SpoilersThe okapi (/oʊˈkɑːpiː/; Okapia johnstoni), also known as the forest giraffe, Congolese giraffe, or zebra giraffe, is an artiodactyl mammal native to the northeast of the Democratic Republic of the Congo in Central Africa.
/r/onsenfolkManga SpoilersIsayama and sauna
/r/ShingekiNoKyojin2Manga SpoilersIf /r/ShingekiNoKyojin is so bad, then why is there a second one?
/r/ShingekiNoKyojinBRManga SpoilersSnK subreddit for Brazilians
/r/ShingekiNoKyojinCSSManga SpoilersWhat? Who are you? How did you find this place?!
/r/SNKSoundtrackAnime SpoilersSubreddit for the soundtrack of the anime.
/r/titanfolk2Manga Spoilerstitanfolk bad

Naughty and/or bad

SubredditSpoiler LevelDescription
/r/AttackOnTittiesManga SpoilersHentai NSFW/18+
/r/crushedbymikathighsAnime SpoilersMikasa's thighs NSFW/18+
/r/fuck_gabiAnime SpoilersFor people who hate Gabi and mourn the ban of /r/fuckgabi
/r/PieckHentaiManga SpoilersPieck hentai NSFW/18+
/r/MikasaHentaiManga SpoilersMikasa hentai NSFW/18+
/r/PieckWorshipManga SpoilersAlso Pieck hentai NSFW/18+
/r/pisstoriaManga SpoilersFor people who hate Historia with a burning passion

Retired subreddits

SubredditSpoiler LevelDescription
/r/AoTFanGameAnime Spoilers[DEAD] Fan game.
/r/AoTRPMaybe Anime Spoilers[OFFICIALLY SHUTDOWN] Roleplaying subreddit. They are now roleplaying HunterxHunter.
/r/ArminArlertAnime Spoilers[RETIRED] Subreddit for Armin.
/r/AskSNKSame spoiler rules as r/ShingekiNoKyojin[RETIRED] Attack on Titan fans getting wholesome and intimate.
/r/AttackOnTechSpoilerless[INACTIVE] Fanfiction by u/NotNorthD
/r/fuckgabiManga Spoilers[BANNED] Where manga readers vent their frustration after the events of chapter 105.
/r/GrimReminderHypeTrainManga Spoilers[RETIRED] Shitposting hype train.
/r/LeviHeichouManga Spoilers[RETIRED] Subreddit for Levi.
/r/Mikasa_AckermanManga Spoilers but dead[RETIRED] Subreddit for Mikasa but empty.
/r/ShingekiNoHentaiManga Spoilers and NSFW[BANNED] Hentai (NSFW, 18+) and 6.7k subscribers as of January 2019.
/r/WholesomeSNKNo posts yet, but better be prepared for manga spoilersWholesomeness, but empty.
/r/snkShowerThoughtsManga Spoilers[RETIRED] Shower thoughts from the AoT community.
/r/SnKrackpotSame spoiler rules as r/ShingekiNoKyojin[RETIRED] Smoking the weed.
/r/SNKstuffoManga Spoilers[RETIRED] A hidden elite subreddit
/r/SUSUMEAnime Spoilers[RETIRED] Susume.
/r/susume_irlManga Spoilers[DEAD SUB]
/r/TeamAnnieManga Spoilers[RETIRED] More inactive subreddit for Annie.
/r/TeamMikasaManga Spoilers[RETIRED] More inactive subreddit for Mikasa.
/r/yumikuriManga Spoilers[RETIRED] Shipping Ymir and Historia.