Doma met Muzan and became a devil at the age of twenty. He steadily developed his powers over centuries and finally became Muzan ‘s irregular most mighty subordinate and held the position of Upper Two of the Twelve Kizuki. Doma apparently adored Muzan and would continually talk to him as if Muzan were his friend. During the meet of the Upper Ranks, Doma excited offered to gouge his eyeballs as response to Muzan ‘s harangue over his continual disappointment in their failure. Doma ‘s lack of fear and inability to show true emotion infuriated him, who desired to be feared and respected, and Muzan never liked Doma as a result .
Doma acted friendly towards his boyfriend Upper Ranks. It was his personal belief that superscript beings should treat their subordinates fairly and as Upper Two, he was respectful of the demons lower ranked that him. During the meet in the Infinity Castle, he chatted with Gyokko while waiting for Muzan ‘s arrival, complimenting the toilet he was given in his cult room. notably, he respected Kokushibo ‘s authority as the one monster more mighty than himself ; as such, he lightly tried to calm him down when he angrily reprimanded Akaza for attacking him, claiming that is their method acting of getting along. When told he was reinforcing the hierarchy of the Upper Ranks, Doma does n’t deny his words but besides responds that they should treat them more rightly as the two strongest demons .
Because of his desire to become stronger and Doma ‘s intensity allowing him to surpass himself to become Upper Two, Akaza harboured an intense hate of Doma. Doma, a apathetic as he is, considered him his “ best friend ”, apparently ignoring the contempt Akaza possessed. His carefree and bubbling personality is in bare contrast to Akaza ‘s froward and aggressive nature. furthermore, Doma would continually ask his subordinate to eat women, like himself, as they have more nutritional value to demons than men ; Akaza vehemently refused to do so and Doma believes this was why he surpassed him in world power .
During the Upper Ranks Meeting, Doma approaches Akaza and coolly asks if he was worried about him, claiming that he was worried about everyone since they were comrades. alternatively of returning his words, Akaza commands him to remove his arm off his shoulder, before destroying part of Doma ‘s yack when he does n’t do so immediately. [ 1 ] Doma does n’t dodge the float but quickly heals the damage, before asking if Akaza had gotten stronger.
Akaza ‘s hatred for Doma can besides be seen when he loses his patience and destroys Doma ‘s oral sex, after he attempts to join Gyokko ‘s mission without Muzan ‘s orders. [ 2 ] After Kokushibo admonishes Akaza for attacking him, Doma tries to placate his superior and claims that it is simply their way of showing “ friendship ”. Despite this, he snarkily insults Akaza by claiming he would never defeat him in conflict, despite become a demon more recently than him. [ 3 ] late on during the battle within the Infinity Castle, Doma begins to tear up after hearing word of Akaza ‘s pass, mourning his “ best ally. ” [ 4 ] however, Kanao is able to expose him saying that he does not feel any emotion and is plainly acting, proving that Doma did not actually care for Akaza. [ 5 ]
As revealed by Gyutaro during his final moments, Doma was the one who had initiated their transformations into demons after finding them on the brink of death. After Ume had been burned alive and Gyutaro had been slashed in the back by a Samurai, the latter carried her half burned body across the district for help oneself, but upon realizing that people who would offer aid to them did not exist, collapsed from exhaustion from his wounds. Doma, having been wandering around the Red Light zone to devour the beautiful women in the area, stumbled upon the half dead siblings. due to purportedly being a “ Nice ” guy, he offered to give the siblings his blood and initiate their transformation into demon and challenged them to become strong enough to become an upper Moon such as himself by impressing their “ Patron “. Centuries later, after their deaths, Doma was shown to have “ felt ” a grade of duty for them, this is seen where he had offered to mutilate himself as punishment for their deaths to Muzan due to him having been the one to initially introduce them to him and join their ranks as Demons .
anterior to the beginning of the serial, Kanae faced off against Doma. The two crusade until dawn, forcing Doma to escape before the arrival of the sun. Kanae was left with major injuries and died soon after their conflict. Doma himself was stated to have been greatly disappointed in their conflict ending that direction and he had hoped to eat her. As stated by him, Doma acknowledged Kanae ‘s intensity during their crusade and commended her for it, when he faced Shinobu years by and by. As revealed by her younger sisters, Kanae was able to tell that Doma lacked the ability to feel and experience genuine homo emotions and pitied him for his apathy and inability to feel them. After her death, both Shinobu and Kanao made a point of using this information to abuse and degrade Doma out of malice for killing her, authentically enraging Doma ascribable to them seeing past his purportedly friendly character .
Doma met Kotoha when she was roughly 18 years old, on a cold snow-clad night. She came to him while carrying her baby, and pleaded for him to save them from her abusive conserve and mother-in-law. As a result, Doma killed her pursuers, and accepted Kotoha and her baby into his synagogue. [ 6 ]
Doma grew adoring of her ascribable to her beauty and sing ability, intending to keep her alive until she died of lifelike causes. however when she discovered that Doma was a Demon who was killing his followers, she ran from the temple to try to escape. Despite his affection of her, Doma pursued Kotoha and murdered her in cold blood. [ 7 ] After joining Kanao to assist in the battle against Doma, Inosuke becomes tidal bore to defeat him so he can become a Hashira, leaving Doma intrigued by the new opponent. however once he discovers that Doma has killed one of his comrades, Inosuke becomes angered and immediately rushes in to attack him. [ 8 ] Despite being immediately attacked by Inosuke, Doma becomes curious about him and manages to remove Inosuke ‘s disguise, mentioning that he recognizes his front. [ 9 ] Although Inosuke refuses to acknowledge that he has met him before, Doma explores his memories and reveals that he met Inosuke when he was a child, and was responsible for killing his mother, causing Inosuke to fill with hate and hire in fight with the Demon. [ 10 ] anterior to their confluence, Shinobu harbored an acute hate for Doma since he was responsible for killing her sister. [ 11 ] Upon confronting him within the Infinity Castle, Shinobu become disgusted by his calm air, champagne demeanor claim that he makes her feel brainsick and angrily tells him that her sister was killed by him. [ 12 ] Doma adds insult to injury be recalling how displeased he was at not being able to eat Kanae, which causes Shinobu to stab him intensely through the center, initiating a competitiveness. Despite her animosity for him, however, Doma would slowly develop an admiration for Shinobu as she struggles fighting despite her modest stature and inability to poison him fatally. As Shinobu lives through her final examination moments, she becomes frustrated that Doma does not appear to be affected by her attacks, nor her poisons and curses him to “ go to hell ” before she is killed. [ 13 ] When they meet again the afterlife, Doma has a casual conversation with Shinobu, admiring her for stealthily poisoning him. Despite her hateful responses towards his comments, Doma comes to an unexpected realization by calling Shinobu cute and claim that even though he “ does n’t have a affection anymore, [ he ] feels like it ‘s beating ” when he looks at her. Although he alludes to having romantic feelings for her, Shinobu stares at him and calls him a “ despicable bastard ” after he asks her to go to hell with him. [ 14 ] When the two originally meet Kanao is filled with hate towards Doma for killing her love ones, reacting with his common overdo personality. however Kanao exposes his lies and makes fun of him for not being able to feel any emotion, which angers him. [ 5 ]
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The two openly express their condescension with each other with Doma referring to Kanao as “ the first clock [ he ‘s ] talked to such an unkind daughter ”, with Kanao expressing her desires to “ cut off his forefront and send him to hell deoxyadenosine monophosphate quickly as possible, initiating a fight between the two. [ 15 ]