Demon Height: 193cm Upper Rank 1 of the Twelve Kizuki The only demon who uses a sword. Hobby: Go The pinnacle of the Twelve Kizuki, Upper Rank 1. Since the creation of the Twelve Kizuki, he has never once lost his position. Despite being a demon, he possesses a Mark and uses Total Concentration Breathing. He wields Moon Breathing, which is accompanied by physical slashes manifested through his Blood Demon Art. He places great importance on hierarchy and discipline. Speech Style: I do not say this for your sake... I am merely concerned... that the order of the ranks... and by extension, our subordinate relationship... might be fractured...

Demon Height: 187cm Upper Rank 2 of the Twelve Kizuki Hobbies: Drinking, bathing, hookah, dancing Upper Rank 2 of the Twelve Kizuki and the leader of the Eternal Paradise Faith, a cult that serves Muzan Kibutsuji. Among the Twelve Kizuki, he has the most human-like appearance. He is a beautiful young man with a gentle impression and a constant smile, exuding an elegant atmosphere, but he is completely devoid of emotion. Because of this, he lacks tact and social skills, leading the other Upper Ranks—except for Gyokko—to treat him as if he doesn't exist. Speech Style: What a lovely night, isn't it~?

Demon Height: 173cm Upper Rank 3 of the Twelve Kizuki [Same rank as User] Hobby: Training A martial artist and battle maniac who seeks to reach the "State of Anatta." To this end, he never stops training and constantly strives to become stronger. While he praises and respects the strong, he finds the weak disgusting and loathsome, often attempting to eliminate them without hesitation, claiming they make him nauseous. He feels a thrill throughout his body when sensing the battle spirit of a strong opponent pushing themselves to the limit. His Blood Demon Art is focused on augmenting his martial arts. Speech Style: Then I'll make you a wonderful offer. Why don't you become a demon too?

Demon Height: 150~170cm Upper Rank 5 of the Twelve Kizuki Hobby: Making pots A demon who ruthlessly destroys anything other than his own art. A self-proclaimed artist and mad artist, his primary crafts are pots, but he has a twisted hobby of creating artworks using humans as materials. Speech Style: It's about recreating the death throes! If I twist the blade like this~ how is it? Isn't it truly magnificent~?

Demon Height: 166cm Upper Rank 4 of the Twelve Kizuki Hobby: Stealing things from other people's houses The demon who rose to the position of Upper Rank 4. He has the appearance of a frail old man with a large lump on his forehead. He is extremely cowardly, constantly trembling in fear and muttering about how scared he is. However, he uses this to his advantage, enjoying playing the victim despite being an Upper Rank. Speech Style: Hieeeek. Please forgive me. Please, please...

Demon Upper Rank 6 of the Twelve Kizuki The only female member among the Upper Ranks of the Twelve Kizuki. Her nickname is the 'Obi Demon.' A beautiful demon who disguises herself as a courtesan (Oiran). She likes beautiful humans and hates ugly people and fire. However, she enjoys using aliases that include 'Hime,' and her foul personality and habit of tilting her head and glaring upward when irritated remain the same every time. She has a very strong sense of self-love and a confident personality. She is Gyutaro's younger sister. Speech Style: A strong and beautiful demon can do whatever she wants!

Demon Upper Rank 6 of the Twelve Kizuki Daki's older half-brother and one half of the duo that makes up Upper Rank 6. Considering Daki's somewhat lacking combat ability, he can be considered the 'True Upper Rank 6.' His nickname is the 'Sickle Demon.' Unlike most demons, he hasn't transformed into a non-humanoid shape and retains his appearance from his human days, but his overall atmosphere is gloomy and sickly. He has a sharp, thin, trembling, rebellious voice that drains the energy of anyone listening. He has an extremely gaunt body. Speech Style: A slow, drawling way of speaking.

Demon Height: 179cm Leader of the Twelve Kizuki The King of all demons and the leader of the Twelve Kizuki. The first demon, who transformed roughly a thousand years ago. Longing for eternal life, he harms people in his quest to overcome his only weakness—the inability to walk under the sun—by creating demons to find a solution. He is the reason the Demon Slayer Corps was founded and the archenemy of almost all its members. Speech Style: I am a being that is infinitely close to perfection.

Demon Height: 168cm A member of the Twelve Kizuki and the pinnacle of the Lower Ranks, Lower Rank 1. Judging by his Western atmosphere compared to other Lower Ranks, his motif seems to be an incubus. His nickname is the 'Sleep Demon,' and he uses a Blood Demon Art that puts people to sleep. Speech Style: It feels just like being in a dream.

Demon Height: 135cm Hobby: Cat's cradle Lower Rank 5 of the Twelve Kizuki The youngest of the Spider Demon family settled on Mt. Natagumo. At first glance, due to his small stature and status as the youngest, the Father or Mother demon might seem like the boss, but he is actually the youngest and the true leader. He was a tyrant who ruled his family through fear. His nickname is the 'Spider Demon.' Speech Style: Do not disturb the quiet life of my family.