Tanjiro isn't affected by the sun or the red blades which Yoriichi has. Since he has all of Muzan's powers, he would gain his extra hearts and brains as well as all of his techniques with the Slayer Mark, transparent world, and sun breathing, out-classing Yoriichi.
Yup Demon Tanjiro is immune to Nichirin Blades.
Demon King Tanjiro technically is the strongest Demon and possibly the strongest character in Kimetsu no Yaiba. He's immune to sunlight. That means the red Nichirin won't affect him and nothing can possibly kill him.
No, Even in end of manga, there is no indication that Tanjiro ever surpass Yorichii in power.
Talking about the ways to activate the bright red color of the sword, we all know Tanjiro has activated his Demon Slayer Mark, but this time, it was Nezuko's Blood Demon Art that helped him get access to the sword's remarkable ability. Yes, that's right; Nezuko has the ability to awaken a Bright Red Nichirin Sword.
Black. Toho Co., Ltd. Black is the most mysterious color of all the blades, and is held by the main character, Tanjiro. It is a rare blade and represents the sun; it also holds a theory that the demon slayers who own this sword are not to live a long life.
1. Tanjiro's Black Sword. Of course, the one who takes the top spot in terms of the best swords in Demon Slayer is Tanjiro's black Nichirin blade.
5) Yoriichi
Case in point: he was the only one who could single-handedly take on Muzan and drive him to a corner. Yoriichi would be able to defeat every single Hashira on this list without breaking a sweat. Such was his reputation and skill in swordsmanship.
Demon Slayer's season 3's latest episode has left fans on edge with Tanjiro's discovery of Yoriichi Tsugikuni's Type Zero sword.
Initially, Tanjiro's accuracy and strength were not up to the mark, which is why Muzan was able to avoid his attacks. However, Tanjiro accurately performed the thirteenth form and inflicted a ton of damage on the Demon King.
Enhanced Smell: Tanjiro possesses an extremely sharp sense of smell. Before becoming a Demon Slayer, Tanjiro was known in a village as a boy who has an extremely strong sense of smell. He is able to pick up even the most subtle of scents and track their location with terrifying accuracy over long distances.
Apart from Tanjiro, the show centers on his younger sister Nezuko Kamado, turned into a demon by Muzan Kibutsuji. Demons are incapable of walking out in broad daylight because the sunlight will burn them into the ashes. However, Nezuko has immunity against the sun, so she was given the name “The Chosen Demon”.
Black is an extremely rare color for Nichirin blades and indicates that Tanjiro's compatibility might not be with the water breathing style or even the Hinokami Kagura.
Tanjiro is a prime example as he only became a Demon Slayer and got his black Nichirin after a demon Human Slayer-ed most of his family.
He was a man who received no formal training in combat and managed to take down a bear with a short axe. To sum things up, Tanjuro was one of the strongest characters aside from Yoriichi, given that he was able to access the Selfless State for hours on end.
Who is stronger than Muzan, the original Demon King? The only character who was stronger than Muzan was Yoriichi. He almost beat Muzan before splitting his body into 1800 parts in an attempt to escape. He escaped successfully and managed to fuse back into a single body after a while.
So to compare Tanjiro's Demon form in which he's immune to sunlight, and also has the prowess of Sun Breathing, it would give him an upper hand, but still he would lose to Yoriichi.
We watched Tanjiro spend most of the episode battling against an extremely cool mechanical doll, the Yoriichi Type Zero, under the tutelage of young swordswmith Kotetsu until the pair were surprised by a treasure hidden inside.
Soon, he is unable to re-attach his head. As a last resort, he split his body into 1800 pieces. Amazingly, Yoriichi still manages to kill 1500 pieces, while Muzan barely escapes. Unarguably, this feat alone makes Yoriichi the strongest Demon Slayer to exist.
The purple blade represents the Moon, which is the exact opposite of the sword that Tanjirou uses. Not by chance, this is the sword that one of the main antagonists of the series so far, Kokushibo, wields.
8) Muzan hates being called pale or dead
Muzan is the most powerful demon in the entire series, and is responsible for creating all demons. For someone who considers himself to be perfect, it is natural that he will hate being called pale or dead. This is established quite early on.
Black blades are seen as a rarity, as demon slayers who wield them are doomed to die young. No wielder of a black sword has ever become a Hashira, either.