My Hero Academia supports a cast of heroes and villains with amazing (and terrifying) quirks. The wide variety of abilities the universe sports is enough to rival its American inspirations in Marvel and DC. With so many quirks, it's inevitable that some might compliment each other, making two heroes compatible partners.
However, where some powers might be formidable in the hands of two individuals, they could be unstoppable when rolled into one. It's time to unfurl the cape and discover which quirk combinations would bring Japan's most deadly villains to their knees. Here are ten amazing hero Quirks that would become unstoppable if they were paired up with another Quirk.
10 Fierce Wings + Whilrwind
Hawks and Inasa's quirks would prove a capable combination and a perfect aerial hero. Hawks's wings would whisk him expertly through the air, while Inasa's whirlwind would compel him to speeds he could not usually reach (without setting his feathers on fire as Endeavor had).
Additionally, Whirlwind would provide a fantastic striking utility. No longer would the hero have to sacrifice his wings in order to inflict projectile damage; instead, he could usher forth intense gusts of wind, simultaneously keeping him afloat and unleashing deadly force.
9 Sugar Rush + Creation
Sato's Sugar Rush quirk and Momo's Creation are a perfect compliment. The former strengthens its user in proportion to how much sugar they consume, while the latter allows the subject to create anything.
Naturally, this would remove the hero's limitation on sugar, should they ever lose the ration provided in their gear. Additionally, since sugar is relatively small and grainy, it would be inexpensive to create. The hero could also make melee weapons to enhance their already implacable assault ~ should they still have the cognitive facilities to do so.
8 Hardening + Engine
Kirishima and Iida's quirks both have deficiencies the other compensates for. Red Riot's hardening makes him an unstoppable juggernaut, albeit somewhat immobile and ephemeral. Subsequently, Iida's Engine makes him an agile fighter, though one easy to break (as seen in his battle with Stain).
Together, they would make an impervious, agile warrior with the speed to attack enemies before his Hardening reached its limit and the durability not to crack after the first punch. They still might lack ranged abilities, but with Engine's speed, it's unlikely they would need it.
7 Navel Laser + Dark Shadow
Tokoyami's Dark Shadow may be a strong quirk on its own, though with Aoyama's Navel Laser, it would be nearly unbeatable. When unbridled, Tokoyami's ability has shown enough destructive force to destroy elite enemies and send hero and villain alike on the run.
Meanwhile, Navel Laser serves as a check to Dark Shadow's power, its brightness reeling the monster in as necessary without completely shutting it down (as Bakugo's quirk might). The laser would also prove an effective surprise attack for enemies wizened to the Shadow's incredible speed.
6 Big Fist + Steel
Tetsutetsu's Steel and Kendo's Big Fist are a natural combination. Like Kirishima, the Steel hero's struggle is primarily with range and sustainability. Big Fist would dramatically increase both the scope of his punch and the damage it would inflict.
However, the hero with both of these quirks could also use it as a defensive utility. For example, against a flame villain like Dabi, the one possessing this combination may cast out their hands to protect dozens of innocent lives without significant risk to themselves.
5 Hellflame + Hydro
As the (former) Number Two Hero, Endeavor alone is a terrifying power to contend with. He can incinerate enemies on a molecular level, instantly reducing them to ashes. His quirk comes with a price; the more consistently he uses it, the higher his internal body temperature becomes. In a prolonged fight such as the one against the Nomu, it is eventually unsustainable.
Therefore, Backdraft's water quirk is a perfect match. It would cool the hero down after impressive displays of infernal might, allowing them to unleash relentless volleys without pause or consequence. Ironically, the result would look much like Todoroki.
4 Copy + Erasure
Erasure may be a strong quirk (especially against the likes of Shigaraki and All For One), though it fares poorly in a team setting. Where it fails, however, Neito's "Copy" succeeds with flying colors. All the hero would have to do is identify the strongest adversary in a group, copy their quirk for themselves, and negate their enemy's usage of said quirk.
For example, a hero fighting against the League of Villains' first invasion could have stolen Kurogiri's quirk, prevented him from using it himself, and then teleported the other thugs and Nomu away. From there, he could handily apprehend Shigaraki alongside the other students.
3 Permeation + Zero Gravity
Permeation allows its user to phase through mass and other attacks as an apparition. Used correctly, it is a strong defensive utility and allows its user perfect opportunities to launch an attack, as villains will haplessly attempt to shoot through their incorporeal form.
Nonetheless, it will still only allow its user ordinary punches against their target, leaving its striking power something to be desired. Zero Gravity is the perfect answer ~ a single touch will disable most opponents, leaving them helpless and at the phantasmal hero's mercy as they slowly float away.
2 Explosion + Jet
Bakugo's explosions are most lethal at close range, as seen in his fights with Deku and Ochaco. While he can use them to propel himself forward and artificially enhance his speed, this would be magnified even further with Gran Torino's Jet quirk.
When combined, it would make for an unstoppable firestorm, zipping across the battlefield in seconds and annihilating all that would oppose them. Villains would have a difficult time targeting their quarry, let alone surviving the swathes of smoldering destruction they would leave in their path. The only problem the combination faces is control, which may be honed through careful practice.
1 One For All + Foresight
Deku and All Might have both demonstrated the extents of what One For All is capable of. They have torn through the worst Japan's criminal underworld could spew up, including the likes of Muscular, All For One, and dozens of other villains.
Nighteye's Foresight would balance their strength with finesse, preventing many of the mistakes they made throughout their combat. For example, should Toshinori have used it against All For One, he would not have accidentally punched Gran Torino in the face. Having several seconds to anticipate enemy movements would make One For All a peerless force for good.