Enmu

Enmu's sadism. Enmu was cold, callous, and sadistic, openly stating that he enjoyed the pain and suffering of humans; his favorite method of torment was giving them a happy and pleasant dream before turning it into a nightmare and taking pleasure in the agonized expressions they made as he tortured them. This sadism even extended to his fellow demons, as he relished seeing his fellow Lower Ranks being killed right in front of his eyes. In contrast to his depravity, Enmu was also effeminate and soft-spoken. He spoke with a tender tone and frequently referred to humans as his "child". As well as sadism, Enmu was shown to exhibit masochistic behaviors, a multitude of times he had expressed positive reactions to pain inflicted on him. This enjoyment, however, seems to be limited only to those he respected and held himself loyal to, the required power over him mostly being hierarchical rather than literal. This masochism was shown most prominently in the Lower Ranks Meeting, during which, upon being gifted with Muzan's blood, a typically torturous and painful experience that could have potentially killed him, Enmu appeared with a smiling and flushed expression, enjoying the experience. Though these masochistic tendencies were not prevalent in his battle against the Demon Slayers when they successfully attacked him, he was seen to be amused, shocked, or frustrated by his failures. Enmu laughs at Tanjiro's anger for intruding in his memories. Like most demons, Enmu had little to no care for human life; he saw humans as nothing more than mere pawns, as he did not bother to warn his human minions of the various dangers of facing Demon Slayers, and simply considered them expendable. Enmu was shown to be very predatory in who he chose as his pawns; he targeted the grieving train conductor and a young man suffering from tuberculosis by promising escapist fantasies. He also seemed to revel in turning humans into his desperate servants by using his power to give them nice and pleasant dreams, before he pulled them out and falsely promised to grant them more if they helped him. Enmu was also intelligent and cautious in approach to anything he executed, having complete understanding of his power's strengths and weaknesses and making sure to both exploit and avoid them respectively in order to succeed. However, upon being given more blood and therefore further empowered by Muzan, Enmu seemed to have become overconfident, arrogant and greedy. This is exemplified when he acted recklessly to obtain more blood from Muzan so that he could properly challenge one of the Upper Ranks to a blood duel, with the ultimate goal to take their place. Ultimately, this proved to be his undoing, as he did not predict his attempts to exhaust the Demon Slayers would be insufficient, eventually leading to his beheading by Tanjiro Kamado. In his final moments, Enmu blamed his death on his opponents and refused to acknowledge his lacking foresight and cockiness, reaffirming his self-belief that he was destined for more and cursing every one of his attackers for getting past him.

Enmu was a slender young man of pale skin complexion who appeared to be in his mid twenties. He possessed a medium build and was of average height. He had ringed blue eyes that tilted sharply down towards the sides of his face, the left one of which had the kanji for |Ka}} and daiji for |Ichi}} etched into its iris, and a horizontal goat-like slit on his right instead of a pupil. He had three square-shaped markings on each of his cheeks, each separated by a smaller square, which fade from green to yellow in color, and straight chin-length black hair which he wore parted to his right, the right side tucked behind his ear. His hair faded into a red-pink color near the ends, but appeared blue at the tips of the two longer, shoulder-length strands that curve upwards and outwards below the base of his neck, from under the rest of his hair. Enmu wore a long, black button-up coat that arched upwards on either side of his legs so that only the two tails in front and behind fell down below his knees, and a white dress shirt, the cuffs of which appeared over those of his coat. He also wore a pair of pinstriped pale gray pants and white heeled shoes. When Enmu received more blood from Muzan Kibutsuji, his left hand formed a mouth at the back, an eye next to it and most of his fingers had the kanji for |Yume}} etched on their skin. In addition, his face had several noticeably veins popping out.

thumb|Enmu's overwhelming power on display against Tanjiro. Overall Abilities: As Lower Rank One, Enmu was the strongest of his echelon and the closest to matching the strength of the Upper Ranks. Upon receiving more blood from Muzan Kibutsuji, his abilities were further enhanced. This level of ability was shown when Enmu's shapeshifting ability evolved to the point where he was able to fuse with a vehicle as big as a train. Additionally, his unorthodox sleep-based Blood Demon Art enabled him to render over 200 passengers in the Mugen Train, including the likes of the Hashira Kyojuro Rengoku, asleep and almost completely vulnerable. In direct combat, Enmu was able to hold his own against Tanjiro Kamado who had mastered Total Concentration Constant, evading his sword swings with ease and constantly putting the Demon Slayer to sleep with his spells. In his fused form, every single inch of the Mugen Train became his body, which took the combined effort of Tanjiro, Zenitsu, Inosuke, Nezuko and Kyojuro himself to ward off and defeat. Despite all this, Enmu realized after his defeat that he wasn't quite at the level of an Upper Rank demon and he still paled in comparison to the likes of Daki and Gyutaro, the lowest members of the Upper Ranks.