The cast of Demon Slayer may not be able to directly control the elements, but their breathing techniques and swordsmanship are still formidable. Ironically, of all the Avatar: The Last Airbender characters that would benefit from training under a Hashira, Aang would benefit the least.
Aang's power already exceeds that of a Demon Slayer and there is no way a Hashira could convince him to kill the demons that haunt their world. Characters like Sokka and Zuko from the ATLA universe, however, would recognize a Demon Slayer's skill and seek out whatever resources they could to replicate their strength.
10 A Breathing Technique Would Help Sokka Keep Up With Team Avatar
In the world of Avatar: The Last Airbender, Sokka is the master of weapons combat. Even after Prince Zuko joined Team Avatar and took the title of the best swordsman, Sokka held on tight to his boomerang and carved out a niche for himself in combat.
If Sokka ever found himself lost in the world of Demon Slayer, his ability to think strategically and fight with his environment in mind would prove to be a huge asset. As long as he found a swordsmith who was willing to forge him a nichirin boomerang, Sokka would do just fine in this crossover.
9 Katara Is Always Willing To Learn New Techniques
The ferocious waterbender from the Southern Water Tribe may not show any hints of weapons mastery in Avatar: The Last Airbender, but she does demonstrate an impressive willingness to learn. After spending her entire adolescent life teaching herself waterbending, Katara nearly killed for the chance to train under a real master.
After almost taking Master Pakku's life, Katara would get the opportunity to train under a master until the Fire Nation attacked the Northern Tribe. Considering the pace that Katara learned waterbending, it should come as no surprise when she picks up a breathing technique shortly after entering the world of Demon Slayer.
8 Zuko’s Firebending Has Always Been Enhanced By His Swordsmanship
In order to compensate for his lackluster firebending skills, Zuko trained tirelessly under Piandao to master the art of swordsmanship. In the first season of ATLA, he puts this skill on display as the Blue Spirit.
As the Blue Spirit, Zuko managed to infiltrate a Fire Nation battleship and escape with the Avatar without ever needing to fall back on his firebending. This solo mission is proof of Zuko's ability to match up with any anime swordsman — even those supernaturally enhanced by breathing techniques like Tanjiro and Zenitsu.
7 Never Count Out Toph
Until Aang overcame Ozai by using spiritbending to remove the Fire Lord's power, there was a legitimate case to be made for Toph being the most powerful character in Avatar: The Last Airbender. It may sound controversial to claim that a side character is more powerful than the protagonist, but ATLA wouldn't be the first series to do this.
In the world of Demon Slayer, Tanjiro is outclassed by a number of powerful characters. One of the characters that outdoes him is the Stone Hashira. Gyomei Himejima is the most powerful swordsman in the Demon Slaying Corps who mastered the art of Stone Breathing in order to become an unstoppable force on the battlefield.
6 A Few Wisteria-Tipped Throwing Knives Would Turn Mai Into A Hashira
Mai's talents are often overlooked by fans because of the testy relationship that developed between her and Prince Zuko. To be completely fair to ATLA fans, Mai's skill as a marksman does play a secondary role in her limited character arc when compared to her time with Zuko.
Still, when considering the way Tengen Uzui took advantage of kunai during his battle against Gyutaro, it should be easy to see just how easily Mai's skills would transfer into the world of Demon Slayer. With just a few wisteria-tipped throwing knives, Mai would become a valuable member of the Demon Slayer Corps.
5 Azula Would Benefit From The Direction Of A Hashira
The firebending prodigy that inherited the title of Fire Lord after Ozai ascended the throne of the Phoenix King is a terrifyingly powerful character. Before she even turned 15, Azula was giving hands to some of the most powerful benders in the world.
If given the chance to join the world of Demon Slayer and commit her strength to the Demon Slayer Corps, Azula would compete with Muichiro for the title of youngest Hashira. She would also give Rengoku a worthy predecessor to train up in the art of Flame Breathing.
4 Jet’s Anger Would Set His Heart Ablaze
After watching his parents die at the hands of the Fire Nation as a child, this rebellious young citizen of the Earth Kingdom went on to lead an impressive, albeit misguided, rebellion. At just 16 years old, Jet and the Freedom Fighters earned the respect of the Fire Nation by standing behind their ideals and going to great lengths to stop their tyranny.
This level of self-motivated conviction would serve Jet well if he ever found himself in the Demon Slayer Corps. He might want to watch his temper, though.
3 June’s Hunting Experience Would Help The Demon Slayer Corps Find Muzan
Every good Demon Slayer must know how to hunt. While a demon hunts, they leave a trail of blood wherever they go, but still manage to conceal their presence from the average citizen.
The main reason Tanjiro was able to excel as a Demon Slayer at such a young age is because of his incredible sense of smell. June may not have the same sense, but she rides the back of a beast that can more than make up for her weakness.
2 There Isn’t A Challenge That Suki Couldn’t Face
There isn't a single member of the Kyoshi Warriors that would struggle in the world of Demon Slayer. Each member is trained in the art of martial arts and weapon combat, making them a formidable match for every threat they face.
Suki is an especially strong member of the Kyoshi Warriors and proves as much by standing up to the prodigious firebending power of Azula. If Suki managed to do this much without a breathing technique, imagine how she would fare against a demon after adding to her impressive repertoire of skills.
1 Piandao Is A Master Of The Sword
The man that helped Sokka forge his space sword and served as a member of the White Lotus wasn't given much screen time in Avatar: The Last Airbender. Still, once it was revealed that Piandao also trained Zuko in the art of swordsmanship, fans were able to assume that even Fire Lord Ozai recognized his talents.
In the eyes of Fire Lord Ozai, power is everything, meaning he wouldn't credit a warrior for anything that they hadn't proven on the battlefield. If Piandao was able to stand tall against Ozai's legions with nothing but a sword, there is no doubt that he would excel in the world of Demon Slayer.