Yoriichi Tsugikini. Yoriichi Tsugikuni is the strongest demon slayer character to have ever existed in the series. He is also the only person that Muzan was ever afraid of. He invented the original breathing styles that later branched out into the ones that Harshiras use to date.
Yoriichi is the most powerful known character in the history of the series and the most powerful swordsman and Demon Hunter, born with the Demon Slayer Mark and the Transparent World. As a kid not trained in sword skills, he was able to defeat a trained sword instructor and was called a miracle.
Gyomei Himejima, the Stone Hashira, is the strongest Hashira in the Demon Slayer corps in terms of strength and swordsmanship.
Gon is far stronger than Tanjiro, and it wouldn't be a stretch to say that Gon would defeat the demon slayer with ease. Tanjiro may be a master of water and flame breathing, but Gon's nen and raw physical powers truly pack a punch.
Shinobu Kocho Is the Weakest Hashira
Of the three Hashira who were killed by Upper-Ranks -- Rengoku, Shinobu and Tokito -- Shinobu was the only one who was killed almost instantly when she encountered Doma, Upper-Rank Two.
1. Gyomei Himejima – The Stone Hashira.
Overall, Zenitsu is an extraordinary powerful Demon Slayer capable of singlehandedly bringing down an Upper Rank, which said to be able to overpower 5 Hashira, in 10 minutes, albeit he would have beheaded Kaigaku in a heartbeat if it wasn't for his feelings of melancholy and pity.
Three Hashira Tanjiro never will beat in Demon Slayer
Giyu's mastery of his Breathing Style (Water Breathing Style) is quite literally unmatched in Demon Slayer. Even amongst his fellow Hashira, Giyu is unique in being the only one who develops a Breathing Style Form of his own.
1 Tanjiro's Patience Paves The Way To A Close Friendship With Inosuke Hashibira.
Killed And Was Killed By Doma
Before arriving at the Infinity Castle, the Insect Hashira consumed roughly 81 pounds of wisteria poison. Even though Doma killed her, he died just as quickly because of the sheer amount of poison he ingested after eating her.
The warrior Muzan feared was a swordsman named Yoriichi Tsugikuni. Yoriichi was the only slayer before Tanjiro who came close to killing Muzan, and the flashback of their fight occurred in Chapter 187.
In conclusion, Tanjiro will not be able to kill Muzan by himself since the Demon King is far superior in every aspect of combat. The manga has shown fans the singular way that Muzan could be bested and it was only due to the collective efforts of Demon Slayer Corps members.
13th form Tanjiro simply blitzes Akaza. In that form, he's relative to WH Muzan in speed who is faster than all the UMs.
Akaza breaks Giyu's sword. Akaza and Giyu are battling fiercely, trading blows to each other. The Water Hashira has used up all his forms during the fight and Akaza proclaims that it will be the end of the Hashira, amazed at how long he fought for.
It is known to be as hard as Iraq. Due to the incredible hardness of his head, tanjiro's headbutts have humiliated powerful characters. in Demonslayer. It's safe to say that tanjiro's head is Hashira level.
Demon Slayers are known for their strength and bravery in battle, but not Zenitsu. Despite his cowardice, he's one of the strongest in the series.
Zenitsu doesn't realize his own strength
In fact, he's upset — he was hoping he would die and get out of having to fight demons. He's not at all confident in himself, often repeating that he "knows he'll die soon" and "it's only a matter of time." Fortunately for him, he does have amazing powers.
There are six forms, but Zenitsu could only learn the first form said to be the basis for the others yet he honed it to where he could fight against several strong demons. He later created a seventh form and defeated his former senior who had become the Upper Rank Six of the Twelve Kizuki.
Sanemi's blood is known to be enticing yet intoxicating to Demons, which he used to bait and stab Nezuko. Sanemi is clearly the least popular Hashira among Demon Slayer fans.
Demon Slayer's Tengen Uzui is considered to be one of the weakest Hashira due to almost losing this fight, but the fact is that Tengen only looks weak when compared to the most overpowered Hashira.
1) Shinobu Kocho
The Insect Pillar of Demon Slayer Corps, Shinobu is undeniably the smartest individual. She might not be physically stronger than others, but her intelligence is what kept her going.