Symbiosis is defined as a mutually beneficial relationship between two organisms that live close to one another. Marvel's Venom takes that one step further by having its alien symbiote live as a part of its host. Across various hosts, Venom has been a villain, a hero, and a slayer of gods. Needless to say, Venom's had quite the history.

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Surprisingly, there has been plenty of symbiote characters across the anime medium. While they aren't always compared to  Marvel's Lethal Protector, they do share some similarities. They can go above and beyond in the power they give their host. Much like Venom, these characters prove that two heads are better than one.

9 Migi Became Shinichi's Right Hand, Literally (Parasyte: The Maxim)

Shinichi and Migi, Parasyte: the Maxim

Parasyte: The Maxim features Shinichi Izumi who, much like Eddie Brock, gets infected with a mysterious parasite. Unlike Eddie, the parasite only ends up taking over his right arm while never gaining the desire to eat humans. Shinichi and the parasite, later named "Migi", end up coming to an understanding to work together for the sake of self-preservation. Migi spends a good portion of Parasyte with a cold and logical demeanor. His only goal is to keep Shinichi alive, which he's quite good at thanks to his ability to shapeshift Shinichi's arm into weapons and heal his wounds.

8 A Pharaoh Became A Part Of Yugi After The Millenium Puzzle Was Complete (Yu-Gi-Oh!)

Yugi Gets Advice From Yami In Yu Gi Oh Duel Monsters

After solving the Millenium Puzzle, Yugi Muto became the host for the spirit of an ancient Egyptian pharaoh. While most fans of Yu-Gi-oh! remember the Pharaoh (known as Yami Yugi and later Atem) for allowing Yugi to rise to the top as a duelist and become the "King of Games," his symbiosis with young Yugi was different the days before Duel Monsters. The Pharaoh would often take over Yugi's body to protect him and his friends from threats. He challenged his enemies to deadly supernatural Shadow Games that would end in the loser having their mind destroyed as they suffer an ironic punishment.

7 F.F. Is Both Stand And Stand User (JoJo's Bizarre Adventure: Stone Ocean)

F.F. JoJo's Bizarre Adventure Stone Ocean

The relationships between Stands and Stand Users in JoJo's Bizarre Adventure are inherently symbiotic. However, F.F. is a special case given they are both Stand and Stand User. Originally an entire colony of plankton, F.F. takes on new life after receiving their Stand power. After a battle with both Ermes and Jolyne, they end up inhabiting the body of the deceased Atroe.

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While F.F.'s host body is technically a corpse, their presence has allowed the body to continue living. They defend themselves and their friends from enemy Stands while both receive a constant supply of water. This is different from how they treated previous hosts, whose life was drained.

6 Saika Lives Inside Anri And Desires To Create More Children (Durarara!!)

Anri Sonohara holds the sword, Saika, in battle stance

Durarara!!'s Ikebukuro is home to many strange individuals, one of which is the mysterious Slasher who is both the weapon and its wielder. Saika is a demonic katana that lives inside the body of its wielder and has a very twisted love for humanity.

As such, Saika desires to create more children for itself by cutting its victims and putting them under its control. While most of Saika's owners end up going completely mad, Anri Sonohara is able to control Saika and its influence. This allows her to not only protect herself, but puts her in control of Saika's army of mind-controlled children.

5 Ragnarok Is Fused To Crona Thanks To Their Black Blood (Soul Eater)

Ragnarok Bullying Crona in Soul Eater

Soul Eater's Crona is the biological child of the witch Medusa, abused and experimented on in the hopes of turning them into a Kishin. This included melting down the Demon Weapon Ragnarok, then fusing him to Crona's black blood. Sharing the same body, Crona and Ragnarok share a bond unlike any other weapon and meister.

In addition to being Crona's sword, Ragnarok is responsible for hardening their black blood and giving Crona power that surpasses human strength. Despite that, Ragnarok is easily irritated by his timid meister and bullies Crona every chance he gets.

4 Senketsu Gives Ryuko Strength, While He Consumes Her Blood (Kill La Kill)

Senketsu defends Ryuko, Kill la Kill

In Kill La Kill, a Kamui is a sentient article of clothing made entirely of extraterrestrial Life Fibers. Senketsu is Ryuko Matoi's Kamui partner in crime, granting her extraordinary power by drinking her blood.

Together in this symbiotic partnership, Ryuko and Senketsu have gained new powers. They've defeated some of Honnōji Academy's strongest students, gone head to head with other Kamui wearers, and freed humanity from Life Fibers after an intense battle in space.

3 Liebe, A Devil That Despises All Devils (Black Clover)

Liebe and Asta, Black Clover

Black Clover's magical world is home to many powerful and terrifying creatures. Devils are the sadistic denizens of the Underworld. Unable to take form in the living world, Devils require a grimoire and a host in order to unleash their power. However, the Devil of Asta's grimoire, Liebe, is different from the rest of his fellow demons.

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With an intense hatred for all Devils, including himself, Liebe has sworn to slay his own kind. After being won over by Asta's offer of friendship, he decided to work with the owner of his grimoire rather than possess him.

2 Sukuna, The King Of Curses That Lives Inside Itadori (Jujutsu Kaisen)

Sukuna, Jujutsu Kaisen

In anime, the sinister presence behind a character's hidden power is often misunderstood. The same cannot be said for Jujutsu Kaisen's Sukuna, the "King of Curses," whose presence is pure evil. Sukuna began slowly building up his return while taking residence inside the body of Yuji Itadori after he ate one of his twenty cursed fingers.

While Sukuna has occasionally saved Itadori and his friends, it was only to accomplish his own goals. Itadori is just a vessel to him and Sukuna gives him access to his power for his own gain. Sukuna also has no qualms about killing his host, as he can revive Itadori whenever he wants.

1 Naruto Learned To Accept Kurama And Use His Power (Naruto)

Naruto and Kurama work together

At the start of Naruto, it's revealed that the monstrous Nine-Tailed Fox, aka Kurama, resides inside the title character. His presence has allowed Naruto to tap into a strength that only a few ninjas possess. While originally hostile and violent to everyone including Naruto, Kurama eventually accepts Naruto as his ally and friend. Now working as equals, Naruto and Kurama gained new power, such as "Kurama Mode" and "Baryon Mode." Their renewed bond became instrumental in the Fourth Shinobi World War and future battles.

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