During his second encounter with Muzan Kibutsuji, he injures his right eye in the Infinity Castle. As the battle progresses, Tanjiro suddenly collapses and his wound begins to form a large mass over his right eye due to the poison inflicted on him by Muzan.
Chapter 204 of the series takes place three months after the battle with Muzan, and gives us an update on the extent of Tanjiro's injuries. Although his demonic transformation physically restored his right eye and left arm, now that he's cured those body parts have been left unusable.
Chapter 204 of the series reveals the extent of Tanjiro's injuries, and although he was able to survive the battle after seemingly coming close to death, he's far from 100 percent as he's completely lost the use of his left arm and can no longer see out of his right eye.
It was after Daki unleashed an attack and harmed multiple people, Tanjiro was extremely angry at this that his eyes were turning blood-shot red.
Namely, in CHapter 202, the Demon Slayers try to reason with Tanjiro and “force” him to fight off Muzan's influence, but it isn't until Kanao injects Tanjiro with the last dose of Tamayo's medicine that he begins transforming back.
Picking up three months after Muzan's defeat, the penultimate chapter shows Tanjiro has recovered from his near-transformation into a demon. However, the injuries he sustained have lasting effects now that he is again human, with his left arm and right eye permanently damaged.
Kanao used the Final Form to defeat Doma, although it rendered her almost blind in her right eye. She later uses the technique once again to administer the demon antidote to Tanjiro.
Nezuko proceeds to instantaneously regenerate her arm, which was cut off as well, leaving Daki uneasy as she realizes that her regenerative abilities are on par with an Upper Rank Demon.
Injured Zenitsu hugs Nezuko. Zenitsu also protects Nezuko multiple times when she is in danger, evident during Zenitsu's first meeting with Inosuke Hashibira and the battle against Enmu in the train. Eventually Zenitsu and Nezuko would marry and start a family as evidenced by their descendants.
Tanjiro certainly did a lot of good with his Water Breathing techniques, but his ability to use Sun Breathing both gives him an edge in battle and allows him to stand out among the incredibly powerful Hashira he fights alongside.
Later it is revealed that he married fellow slayer Kanao Tsuyuri, In the Modern World, Tanjiro and Kano had Great-great-great grandsons named: Sumihiko Kamado and Kanata Kamado.
It involves covering a Nichirin Sword with Nezuko Kamado's Exploding Blood to raise its temperature to the point it turns bright red.
Tanjiro is an expert at the Water Breathing style
These are systems of swordplay that allow demon slayers to enhance their strength and incorporate mystical, elemental-based abilities to their combat.
Because he uses sun breathing, he would be immune to the sun, just like nezuko. Who is the most powerful person in the Demon Slayer universe? Referred to by Inosuke and Tanjiro as the strongest Hashira and Demonslayer.
After returning to his human form, Tanjiro loses the ability to see from his right eye, the iris of which is now a dull pink-gray color and the pupil black rather than its original white.
To sum things up, Tanjiro died fighting Muzan and was revived within seconds due to the transfer of blood from the Demon King to Tanjiro. He turns into a Demon and Kanao injects a certain medicine made from Wisteria flowers that turns him back to a human.
During his battle with Muzan Kibutsuji, he loses his right arm.
Since Kiriya Ubuyashiki announced the disbanding of the organization, Tanjiro doesn't get the chance to become a Hashira. The series also features an extended finale set in modern-day Japan.
1/10 Tenth Form: Constant Flux/The Dragon of Change
The most powerful water move in Tanjiro's current skill set, this is a form that gets more and more powerful with each rotation that he puts in. It's number one on the list because it has, theoretically, no ceiling when it comes to its intensity.
In the far chapters of the Demon Slayer manga, Tanjiro is actually turned into a demon by Muzan Kibutsuji. Muzan does this to continue his demon legacy and live in this world even after being dead. He chooses Tanjiro over everyone else as he considers him the perfect one to carry on his legacy.
It is confirmed in the Volume 23 extras that Inosuke and Aoi did eventually end up together and that they have two great-grandsons, one of which is Aoba.
Nezuko survives without eating humans because unlike other demons who need human flesh to get back their energy , nezuko gets back her energy sleeping . As we see in the anime she sleeps in the box Tanjiro carries on his back .
Nezuko most likely has those orange tips on her hair because of the demon blood in her. Tokitou, Inosuke and Kanao (as seen in the latest cover art featuring her) most likely has coloured tips on their hair most likely because of the influence of their particular Breath Styles.
However, the trait that sets her apart from all other demons is the fact that she has the ability to conquer the sun, prompting the Demon King to call her the "chosen demon". Abnormal Demon Physiology: As the "chosen demon", Nezuko has several unique demonic traits that set her apart from all other demons.
There is no logical reason in relation to the plot that suggests why she has a horn. While fans might assume the horn grows on people with some relation to the sun, this wasn't the case for Tanjiro, who also turned into a demon. The only other reason that could explain the horn's existence is purely aesthetic.