After Doma's demise,
She also loses the ability to see out of her right eye due to her using Flower Breathing's final form to take out the Upper Rank, with her eye gaining a defined pupil with a dark ring around it and becoming deprived of its gradient.
Kanao and Tanjiro would eventually marry and start a family, having two great-great-grandchildren by the names of Kanata Kamado and Sumihiko Kamado between them.
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.
Enhanced Vision: Kanao possesses extremely sharp eyesight, being able to accurately predict her opponent's next attack and movements by simply observing the subtle shifts of their muscles, joints and the slight movements of their eyes.
She recalls that when Kanae died, she was unable to cry, but no one judged her for it. Kanao remembers how Kanae had advised her to value her comrades, and wonders if she did so correctly this time, as she cries for Shinobu.
Kanao never spoke before being adopted into the Demon Slayer Corps and continued to have difficulty speaking after officially joining the other demon slayers. To help with her indecisiveness and other struggles, Kanao often flips a coin she received as a gift.
Kagaya Ubuyashiki in 'Demon Slayer'
Kagaya Ubuyashiki is a descendant of the Demon King, Kibutsuji Muzan. The reason he is blind is that a curse is slowly taking away his life. The Ubuyashiki family is inflicted with this curse as they are the ones who birthed the very first demon.
Gyomei is blind, thus explaining the reason for the lack of pupils in his eyes. He was blinded due to a fever he had when he was a child.
The fuming rage that Tanjiro felt from seeing Daki destroy human lives helped him push past his limits while also making him bleed through his eyes in anger, resulting in his eye colors changing to bloodshot red.
Shinobu to Giyuu on Kimetsu no Yaiba Official Light Novel. GiyuShino is the het ship between Shinobu Kocho and Giyuu Tomioka from the Demon Slayer fandom.
Eventually Zenitsu and Nezuko would marry and start a family as evidenced by their descendants.
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.
Kanao is a dedicated demon slayer and a good friend to Tanjiro. She hardly ever speaks, even to Tanjiro. Instead, she flips coins to make her decisions for her, making her oddly similar to Two-Face from the Batman comics. She might have a few words for Tanjiro, though, with or without that coin.
After the battle, Kanao starts wearing Shinobu Kocho's hairpin instead of Kanae's as the latter is broken as a result of her combat, and she also loses the ability to see out of her right eye as she uses the final form of Breath of Flower to defeat the Upper Moon.
1) Obanai. Obanai, without a doubt, has one of the most unique eyes in the entire series. His irises are of two different colors and this condition is called heterochromia. Obanai's eyes are quite appealing and the colors are beautiful as well.
He is one of the show "top protagonists", standing effortlessly over his fellow Hashira. He is extremely muscular and powerfully built. He has black spiky hair, and a prominent scar that runs across his forehead horizontally. He has been blind with no irises nor pupils.
When it comes to pure strength, Shinobu Kocho is the weakest Hashira in Demon Slayer. She doesn't even have enough strength to decapitate a demon's head and she makes up for it by injecting poison into the demons.
The number one ranked Kizuki is the terrifying Kokushibo, whose six orange eyes mark him out as one of Demon Slayer's most striking character designs.
As the young slayer aids in picking off more and more of the Twelve Kizuki, Muzan finds just as many reasons to be scared of Tanjiro Kamado. Tanjiro also ends up being the one to land the final blow on Muzan's original body, further proving why Muzan is scared of Tanjiro throughout the series.
Post-Transformation
Sensing their despair, Doma offered a chance to him and turned both Gyutaro and Daki into demons.
The muzzle serves as a representation of Buddhist practices. First, it gags Nezuko, preventing her from speaking like a Buddhist monk's vow of silence, but it also is there to suppress her desire to eat humans. Through a Buddhist lens, Nezuko's muzzle is the symbol of a Buddhist monk.
Later it is revealed that he married fellow slayer Kanao Tsuyuri. In the Modern World, Tanjiro and Kanao had descendants named Sumihiko Kamado and Kanata Kamado.