Akaza, Douma, Kokushibo - demon slayer

Akaza: Akaza was a headstrong, stubborn, and battle-crazed social Darwinist who enjoyed fighting, especially against strong Demon Slayers. He purposefully drew out fights to savor every moment of it; the Upper Rank tended to become enthralled whenever he was hit by a powerful opponent, not due to masochism but out of a genuine admiration for their skills. Akaza always complimented his opponents when they unleashed powerful techniques or landed blows on him, usually remarking that their techniques and swordsmanship were magnificent and intriguing. Akaza looked down on anybody he deemed weak, so much so that his skin would crawl at the sight of them. He genuinely respected those who were strong in his eyes, demanding to know their names, and would not stop until he found out; he remembered all the names of strong opponents of the past and committed them to memory as a tribute to their strength.

Douma: Doma is outwardly friendly and cheery, possessing an approachable and charismatic air. Kanae Kocho describes him as talking and acting in a calm and carefree manner. However, in truth, he has psychopathic tendencies and adopts sick beliefs and habits, such as devouring his cult's followers with the belief he is saving them from their suffering and pain by letting them live inside his body.

Because of his carefree and waggish persona, he was prone to facetious and inappropriate behavior. Even amongst his fellow demons, he was disliked by Muzan Kibutsuji and Akaza for his casual and childish behavior, and indifference to the strict hierarchy that showed complete and total obedience towards the Demon King, demonstrated by him speaking in the same merry cadence during Muzan's rants. Even Gyokko, a demon with an amicable relationship with Doma due both sharing morbid tendencies, was perturbed when the Upper Rank attempted to accompany him and Hantengu to the Swordsmith Village without Muzan's explicit permission.

Kokushibo: Kokushibo is reserved, silent, and aloof, maintaining an aura of unnerving tranquility and mystery that complements his position as Upper Rank One. He rarely speaks; when he does, he talks in a slow and emphatic manner that gives more gravitas and authority to his words. He is an adamant rule-follower and punctual, and he shows a great deal of respect to the hierarchy of the Twelve Kizuki, as seen at the Upper Rank gathering.[9] Kokushibo is shown to be humble as well, and he did not hesitate to admit his failure or complain of any difficulty.

He demonstrates unwavering loyalty towards Muzan Kibutsuji as he carries out his actions solely to fulfill Muzan's objectives. Despite his outward display of reservation, dignity, and humility, there exists a cold and unforgiving side to his personality. When reprimanding individuals, his words can be harsh, bordering on cruelty. His threats are severe and demand absolute obedience.

Appearance: Kokoshibo: Kokushibo is a tall man with a muscular build and a pale complexion. He possesses long, spiky black hair with red tips, that he keeps in a ponytail, along with two shoulder-length, flowing, wavy bangs on each side that reaches to his collarbone. His most notable feature is the three sets of eyes on his face with yellow irises and red flesh sclera that have black straight lines diverging from each iris. His middle set of eyes has the kanji of "Upper Rank (上じょう弦げん Jōgen?)" on engraved on his left eye, and daiji for "One (壱いち Ichi?)" on his right, while his other sets of eyes feature black pupils and a cracked pattern in the irises. His top set of eyes replaced his eyebrows. Kokushibo also has red markings resembling flames for his Demon Slayer Mark on the top left side of his forehead that extended down to his left temple, and the bottom right of his cheek down to his right side of his neck. His appearance is described as profoundly majestic and dignified by Muichiro Tokito.[8]

Kokushibo wears a purple-and-black hexagonal-patterned nagagi kimono and black umanori-styled hakama pants tied with a white uwa-obi, with pair of zōri with purple straps and white tabi socks. He carries a fleshy katana at his waist that, has eyes in the space between the tsuka ito wrapping of the handle of his sword. The tsuba and blade are shown to have eyes and veins. The scabbard is also fleshy in appearance.

Douma: Doma is a tall young man with a lean, muscular build. He is of extremely pale complexion and possesses long, pointed nails that appeared to be stained with a pale purple. He possesses long platinum blond hair that he wore parted to his right, the shorter parts around his face seeming to flare out to either side around his head, curving backwards with one lock slanting down to the right of his face to fall between his eyes, while the longer parts were left to drape centrally down his back in a thinning spiral. Due to his beauty, he was seen as a divine being, and as such, he was made into a cult figure.

His eyes have been described to be incredibly rare and beautiful,[12] as, in color, they appeared to be made up of an array of rainbow pastel tones that fade into one another as they circle his irises, this unusual appearance even causing people to believe Doma is a blessed being who could communicate with the gods. The kanji for Upper Rank (上じょう弦げん Jōgen?) is etched across his left eye, and the daiji for Two (弐に Ni?) or Six (陸ろく Roku?) at the time when he first met Gyutaro and Daki[13] on his right, with thick eyelashes and a set of notably thick black eyebrows acting to frame them above.

Doma wore a blood-red turtleneck of a design that made it appear that the section between his neck and upper chest is covered by a black substance that looks like it is dripping slightly down his body, with this same design being repeated at his wrists and down his hands, as well as on the small, circular red and black "stain"[14] that adorned the top of his head. Below this, he wore a pair of straight, tan-colored hakama pants of a pinstriped design, their cuffs visibly loose, which he secured with a pale green-tinged golden belt (originally colored black, and colored white in the anime), its buckle a bright silver. He also only wears plain black tabi socks on his feet.

Akaza: Akaza was a very muscular young man of average height with skin so fair it appeared bright green-tinged white, decorated by a pattern of thick blue lines, which resembled the criminal tattoos he had as a human. Akaza had short, cerise hair that fluffed out around his head and inward-tilting yellow eyes with pink eyelashes and blue sclera that somewhat resembled cracked glass. The kanji for Upper Rank (上じょう弦げん Jōgen?) was etched into his right iris, and the daiji for Three (参さん San?) was etched into his left.

The lines on his face curved through each of his eyes from below his ears to over his temples, another blue line running from the center of his hairline to the bridge of his nose, with two more lines running around his neck, three others branching off the lower one to his torso. The middle line ran directly down his chest to halfway down his stomach, and the other two branched off to the sides over each side of his chest to join the two other lines. This same three-line pattern also repeated around his waist. On his arms, lines were running down the front of his shoulders that ran into two more, which went around his biceps before continuing to run down to his wrists, below which each of his fingers was also dark blue with an orange fingernail. His toes and toenails also sharing this unusual appearance as his fingers and fingernails.

Akaza wore little and only sported a short, sleeveless dark purple-pink haori cut off at his waist, left open to expose his chest, and decorated by a square pattern on his back. Below this, he sported a pair of baggy white pants that he rolled to just below the knee with a turquoise rope belt to secure them at his waist, with bright pink tassel ornaments hanging on the front and the back of the rope belt. Akaza preferred to go barefoot but wore a pair of chains of large, round, red pearls around his ankles.