Secret societies are some of the most mysterious and intriguing organizations in anime. While there are many iconic anime guilds, only a few have such interesting stories and highly manipulative characters as secret societies. Some of the most shocking and unforgettable plot twists in anime history are thanks to these secretive organizations and the great strategists who lead them.

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Many of these secret societies in anime have terrifying and wicked leaders and members who want to destroy and take over the world. However, there are also great warriors who founded these societies to protect and get rid of demonic creatures and all kinds of monstrous characters. Anime lovers could go on some of the most unforgettable adventures and meet the most devious evil anime tyrants and bravest anime heroes of the past, present, and future who secretly changed the world forever.

7 V - Tokyo Ghoul

Kaiko in Tokyo Ghoul

V, also known as Vasuki, is one of the most deadly and evil anime secret societies. They're unknown to most, and their members are half-humans whose goal is to maintain the balance between humans and ghouls. While they're not as murderous as some of the ghoul terrorist organizations in Tokyo Ghoul, they're still merciless killers who didn't prioritize human life over monsters.

Tokyo Ghoul is one of the darkest and most thought-provoking horror fantasy anime series of all time. It's a gore and thought-provoking story about a young boy, Ken Kaneki, who gets transformed into a half-ghoul and decides to take revenge and protect others from the human-eating ghouls.

6 Eden - Code: Breaker

Rei in Code Breaker

Eden is one of the oldest anime secret societies that's over a hundred years old. It's also one of the most secretive organizations that have three mysterious leaders. Eden has some very powerful members, including some of the most successful politicians and business leaders in Japan.

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They're the ones who decide about the missions and give out the orders to selected Code:Breakers and Code:Names. Code: Breaker is one of the best supernatural anime series about a high school girl named Sakura who tries to stop a secret organization and its supernatural assassins from killing.

5 Nemesis - My Hero Academia

Deku in My Hero Academia

My Hero Academia is one of the most fun and motivational action shows filled with mysteries, secretive characters, and secret societies. One of the anime's most unknown secret societies is the Nemesis. They were founded to help other hero agencies protect Japan's public from villains.

However, they work from the shadows, and the society members' identities remain secret even from other pro-heroes and hero agencies. My Hero Academia is one of the twistiest anime shows with some of the scariest villains, powerful heroes, and iconic anime impostors ever. The story follows the young Deku, who finally gets a Quirk and embarks on a journey to become the greatest hero of all time.

4 Mage's Association - Fate/Stay Night

Artoria in FateStay Night

Mage's Association is another old anime secret society that was founded sometime during the Middle Ages. It's one of the biggest international organizations that secretly tried to control, develop, and keep magecraft from the wrong hands.

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They also try to forbid criminal use of magic; however, their main concern is to keep their secret from the common public. Fate/Stay Night has some of the best Fate servants and supernatural warriors, and villains who are skilled fighters and magic users. Its story follows a young teen named Shirou who enters the deadly tournament of the Fifth Holy Grail War, so he can get his wish granted.

3 Inferno - Phantom: Requiem for the Phantom

Reiji in Phantom Requiem for the Phantom

Inferno is one of the deadliest anime secret societies. This secretive mafia organization is one of the biggest in America that wanted to use its powers to get all underworld mob organizations under its control. They used assassins called Phantoms, who did their bidding and killed those who opposed them.

Phantom: Requiem for the Phantom is one of the best action anime series of all time. The anime is about a secret organization and follows two of its most skilled assassins, Ein and Zwei. The story follows their adventures and journey toward gaining back their real memories after the Inferno brainwashed them and turned them into merciless assassins.

2 SEELE - Neon Genesis Evangelion

Rei from Neon Genesis Evangelion in front of the moon

SEELE is one of the most iconic futuristic secret societies in anime. This mysterious but powerful secret organization has many influential members who are able to influence the world government as well as some of the most vital organizations and businesses all over the planet.

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They're one of the deadliest secret organizations that were responsible for millions of deaths that were caused by the Second Impact. Neon Genesis Evangelion is one of the best mecha anime set in a dystopian future. The story mainly follows a group of Evangelion pilots and other Nerv members who are trying to prevent Angels from causing more deadly cataclysms.

1 Hellsing Organisation - Hellsing

Alucard in Hellsing

Hellsing Organisation is the biggest and most mysterious secret society in England that was founded to kill all supernatural beings, including vampires and all non-human creatures who enter the kingdom. While they work on killing all supernatural beings, they also use their help and create their own supernatural warriors.

Hellsing is one of the darkest fantasy historical anime shows that follows the adventures of two vampires Alucard and Seras, who were created by the Hellsing Organisation. The two new vampires soon become the leaders of the war against all supernatural foes in England.

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