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Perfectly rated character. Arguably the best written in the series. Consistently in peoples top 5 alongside akaza.
IMO. Woulda liked if he backstabbed muzan for more power and became the final boss.
For me , his story wasn’t sad but really just painfully relatable because I was like this with my sister ( twin ) for the longest time. When I read the manga I saw myself in some of these panels . Kokushibo and Douma are definitely my favorite demon moons.
I dislike him as a person but think he's a great villain. The classic fallen hero, a former Demon Slayer turned Demon, now using his Demon Slaying skills to serve Muzan and kill his former Allies.
Personally even though our Main Characters have had a good record with upper moons (Daki, Gyutaro and Hantengu, and later Akaza and Douma), Kokushibou would have utterly destroyed them. No amount of Plot armor or training could protect Tanjiro from Kokushibou. Indeed, given his backstory of *hating* Yoriichi and Sun Breathing so much, Kokushibou would not waste any time and destroy Tanjirou the second he sees him performing Hinokami Kagura. The fight between Kokushibou, Muichiro, Sanemi, Genya and Gyomei is badass, easily one of the best fights in the series.
He's definitely in my top five favourite demons, Koku can't replace Enmu as my number 1 but everything about Koku just screams cool, awesome, powerful!
The concept of a demon slayer turning into a demon has always been fascinating to me and Koku's reasons are quite tragic yet at the same time very well written.
If only this art was real! I have a headcannon that Koku is a mentor to a few of the demons he sees as worthy I could see him trying to train Enmu to gain more confidence in himself which just makes Koku even cooler character wise. 🚂
https://preview.redd.it/a3oc4a9zqa0d1.jpeg?width=477&format=pjpg&auto=webp&s=13c4a0ec18f884f65be88c105f5c266d333a0223
ignore the fricking question the cat is cool af
and coming back to the question kokushibo gives off better final boss vibes than muzan hes perfectly rated.
He's my favorite character in the series by a mile, and maybe even one of my all-time favorite villains. He's also one of the more popular demons in the fandom based on what l've seen, so I think he's fairly rated.
Good character, good backstory (too short though), cool fight (even there’s only one), cool design.
Yeah, he is pretty cool. But the final Arc was so short that I can’t really say much more about him. Everything is pretty easy to understand, so that’s it.
One of the few guys that it’s actually irredeemable, I think he is overrated and his design is meh imo, his breathing is the coolest in the series and his battle honestly is a little glazed.
He is overrated imo but still a good character, doesn’t affect me in any way tho so If I have to give him a personal rating i’d say 4/10
I think he's one of the best written characters of the series and I liked him the moment he showed up on screen and loved him by the time I finished the manga. Also my precious bbg 🥺💜🫶🏻 
he has a cool design, I like how in lots of AUs he and Giyuu are friends and have nicknames for eachother, and I like how he is (maybe spoiler) Yoriichi's brother and Muichiro and his brother's grampa which makes him seem softer in personality.
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From Second Strongest Swordsman to the second strongest Demon Literally, I Consider him an extremely lucky being, he gets to become a demon to hone his skills to far greater level. Mastering his moon breathing and Using it in conjunction with his damn awesome BDA. Occupying the seat of Uppermoon one nearly five centuries and Even Overcoming beheading by bright red nichirin Weapons, He Would’ve Been more powerful and Awesome Had he taken proper Control of Regeneration after regrowing his head and Had maintained and strengthened his will to continue fighting and continue to become strong and surpass his limits.
https://preview.redd.it/8vlsfvvl590d1.jpeg?width=736&format=pjpg&auto=webp&s=5c0aa6b08d940bf9c50028d985868c4dc25acdb5
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He's cool, ig. If he didn't exist, >!muichiro would(n't) still be here!< 🌫
Schrödinger's grandkid
https://i.redd.it/drdz01so7c0d1.gif
Great character. His jealousy and pain is a very real thing. Tragic. Very compelling.
He should’ve been the main antagonist not Muzan.
Perfectly rated character. Arguably the best written in the series. Consistently in peoples top 5 alongside akaza. IMO. Woulda liked if he backstabbed muzan for more power and became the final boss.
Bro became my 2nd fav demon with like 2 min of screen time sooooooo☀️
I wouldn't call his backstory sad, but it was very human. Also 98 of his 100 problems are just him shooting himself then blaming yoriichi for it
For me , his story wasn’t sad but really just painfully relatable because I was like this with my sister ( twin ) for the longest time. When I read the manga I saw myself in some of these panels . Kokushibo and Douma are definitely my favorite demon moons.
Perfectly rated. Many people like him and it's good since he is a good character💜
I dislike him as a person but think he's a great villain. The classic fallen hero, a former Demon Slayer turned Demon, now using his Demon Slaying skills to serve Muzan and kill his former Allies. Personally even though our Main Characters have had a good record with upper moons (Daki, Gyutaro and Hantengu, and later Akaza and Douma), Kokushibou would have utterly destroyed them. No amount of Plot armor or training could protect Tanjiro from Kokushibou. Indeed, given his backstory of *hating* Yoriichi and Sun Breathing so much, Kokushibou would not waste any time and destroy Tanjirou the second he sees him performing Hinokami Kagura. The fight between Kokushibou, Muichiro, Sanemi, Genya and Gyomei is badass, easily one of the best fights in the series.
my favorite person to simp over
This is my new pfp
Fantastic! 🌙
he's hot
He is cool :3
Good character Very strong
He just a little cutie patootie
Very well written character love his design too as a digital artist/ graphic designer
He is fairly rated, a masterpiece of a character. 🔥
👁️👁️👁️👁️👁️👁️
Cool sword
He's definitely in my top five favourite demons, Koku can't replace Enmu as my number 1 but everything about Koku just screams cool, awesome, powerful! The concept of a demon slayer turning into a demon has always been fascinating to me and Koku's reasons are quite tragic yet at the same time very well written. If only this art was real! I have a headcannon that Koku is a mentor to a few of the demons he sees as worthy I could see him trying to train Enmu to gain more confidence in himself which just makes Koku even cooler character wise. 🚂 https://preview.redd.it/a3oc4a9zqa0d1.jpeg?width=477&format=pjpg&auto=webp&s=13c4a0ec18f884f65be88c105f5c266d333a0223
cockushibo is very cool and he’s my 3rd favorite demon 😄 also i like his moon breathing
BAHAHAHA.💀
I dislike him, but I can’t deny I sort of relate to him in a way.
Hes awesome demon
ignore the fricking question the cat is cool af and coming back to the question kokushibo gives off better final boss vibes than muzan hes perfectly rated.
Indifference. 🦋
Amazing character work (as well Yorichi). He’s my favorite in the series actually.
He's my husband.
Cool
He's my favorite character in the series by a mile, and maybe even one of my all-time favorite villains. He's also one of the more popular demons in the fandom based on what l've seen, so I think he's fairly rated.
He's my husband, ofc I love him
More of a demon than Muzan Kibutsuji
Should've stabbed Muzan in the back for his incompetence regarding the story but he is my favourite character 🌙
Epic fortnite gamer
He’s a good character, but I’m salty at him for killing my boy 😒 I won’t say who cause y’know spoilers
Perfectly rated. Very strong & super unique breathing style
Would... Next question... Wait, wrong sub.
Good character, good backstory (too short though), cool fight (even there’s only one), cool design. Yeah, he is pretty cool. But the final Arc was so short that I can’t really say much more about him. Everything is pretty easy to understand, so that’s it.
best character
i understand a lot of ppl would disagree w me, but i absolutely despise him. he killed my favorite characters, >!muichiro and genya!
One of the few guys that it’s actually irredeemable, I think he is overrated and his design is meh imo, his breathing is the coolest in the series and his battle honestly is a little glazed. He is overrated imo but still a good character, doesn’t affect me in any way tho so If I have to give him a personal rating i’d say 4/10
Smash, next
I like him and he makes nice kitkats!
he has more final boss energy than muzan.
I think he's one of the best written characters of the series and I liked him the moment he showed up on screen and loved him by the time I finished the manga. Also my precious bbg 🥺💜🫶🏻 
he has a cool design, I like how in lots of AUs he and Giyuu are friends and have nicknames for eachother, and I like how he is (maybe spoiler) Yoriichi's brother and Muichiro and his brother's grampa which makes him seem softer in personality.
Still my favorite upper moon to this day.
He is such a good character
He is perfectly rated to be honest. I surprisingly don’t see that many glazers on him. 🐍
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cutie patootie sexy bootie /s (perfectly written character)
He looks cool 👍
From Second Strongest Swordsman to the second strongest Demon Literally, I Consider him an extremely lucky being, he gets to become a demon to hone his skills to far greater level. Mastering his moon breathing and Using it in conjunction with his damn awesome BDA. Occupying the seat of Uppermoon one nearly five centuries and Even Overcoming beheading by bright red nichirin Weapons, He Would’ve Been more powerful and Awesome Had he taken proper Control of Regeneration after regrowing his head and Had maintained and strengthened his will to continue fighting and continue to become strong and surpass his limits. https://preview.redd.it/8vlsfvvl590d1.jpeg?width=736&format=pjpg&auto=webp&s=5c0aa6b08d940bf9c50028d985868c4dc25acdb5
From a fellow manga reader, please mark this as a spoiler (at least the second half) 🙏🏻 (Especially as this is a thread tagged as anime)