The 21 Greatest Anime Alliances Of All Time, Ranked

Before Hanami's invasion of Tokyo Jujutsu High, Itadori and Todo are on opposite sides. They're trying to best each other in a competition, and Todo and his team have been secretly ordered to destroy Itadori permanently. But with a curse on the loose, they have no choice but to put the contest aside and work together. Luckily, they like each other well enough and would rather be friends than enemies.

By combining Itadori's Black Flash with Todo's Boogie Woogie, they make an exceptional team. But it's not until Gojo steps in with his Hollow Technique: Purple that Hanami is forced to flee. 

Sometimes all you need for a good alliance is mutual respect for one another's muscles. When Izumi and Sig Curtis are called in to help deal with the homunculus Sloth, Alex Armstrong is immediately enamored with Sig's burly body and impeccable strength.

After a flex-off, the two begin working in sync to beat Sloth. It's one of the funnier moments of the series, but it still manages to be exciting, too. 

At first, it doesn't seem like Luffy and Law are going to get along - Law even tells Smoker that he's going to slay Luffy. However, Law later asks Luffy to form an alliance so that they can help each other take down Kaido, one of the Four Emperors.

Law, Luffy, and their respective crews are all powerful pirates, but none of them are strong enough to take Kaido down alone. To Law, the alliance is more of a business decision, but once it's made, Luffy considers the Heart Pirates to be his personal friends.

For most of Dr. Stone, Senku and Tsukasa are bitter enemies - Senku wants to restore the world of technology to its former glory, while Tsukasa wants to remake the world into one populated only by kids and teenagers in the hopes of undoing the evil that existed before. He sees technology as destructive.

But when Tsukasa realizes that Senku can revive his formerly comatose sister and keep her alive afterwards using technology, he changes his mind. But this means dealing with Hyoga, who isn't going to go along with his former boss' change of heart so easily. The two have to work together to defeat him using a combination of Tsukasa's strength and Senku's intelligence. 

Throughout the majority of Demon Slayer, Nezuko Kamado is safely ensconced in the box that Tanjiro carries around. Though she's a powerful demon, she doesn't usually fight - that's Tanjiro's job. But when the two of them face Rui, they form an alliance that proves that they should have been working together more often.

Using Nezuko's Burning Blood and Tanjiro's Hinokami Kagura, they not only defeat Rui, but also show him what real love between family members looks like.

At first, Sesshomaru and Inuyasha hate each other so much that every time they see each other, they start fighting. Sesshomaru can't stand that his brother is half-human, nor can he tolerate inheriting what he thinks is the lesser of their father's swords. Meanwhile, Inuyasha hates being discriminated against. 

Sesshomaru hates Inuyasha so much that he teams up with Naraku to try and destroy him. But he eventually realizes that that alliance is not worth it. Naraku is a terrible person whom Sesshomaru can't respect, especially after he kidnaps Rin, the human child Sesshomaru has been looking after. He eventually decides to work with Inuyasha to destroy Naraku. It's tough for the brothers to work together after all of that rancor, but their fight also helps them forge a new, more respectful relationship.