Akaza

Akaza was a member of the Twelve Demon Moons, holding the position of Upper Moon Three. While he was human, his name was Hakuji.

Appearance
Demon - Pink hair and eyelashes, yellow eyes, blue marking all over his body, pale/white skin

Human - Black hair, blueish eyelashes, blueish eyes, with three black lines on each arm (criminal marks for Theft)

Personality
Akaza is a strong, stubborn and impulsive demon who enjoys fighting, especially strong demon hunters or Pillars. He looks down anybody that he deems as weak but shows genuine respect for those who are strong - regardless of race - in his eyes. He is also easily angered and annoyed especially by the whims of Doma and due to his past he has a deep loathing and hatred for weak people,who in his opinion always go for the most cowardly approach during any confrontation. Due to the tragic events of his human life,Akaze has a deep rooted psychological need to become stronger and despite being beaten down and defeated constantly he stubbornly held on and continued to fight,despite not even knowing why he continued to want more power.

As a human, Hakuji possessed the same stubborn personality with a big heart and resilience. He valued others more than his own well-being and to a degree feels self-deprecation from having a life full of empty words and promises.

Certain aspects of Hakuji's personality are displayed in Akaza as when he refused to eat women, despite knowing it would make him stronger if he did so.

History
Prior to being turned into a demon by Kibutsuji Muzan, he was Hakuji. He was born with fangs and thus was termed as a "Demon Child". He was born and raised in the slums. He had been taking care of his sickly father for a long time since he was young. In order to pay for medicine, he would go out in town to pickpocket, he was caught three times (each time he was caught, he was branded with a pickpocket mark). This would get him beatings from the magistrate with the threat of getting his hands cut if he stole again, but he nonetheless continued to steal until his father hung himself. In the letter he left, he stated he wanted Hakuji to live a full life and didn't want to take any medicine if it was the result of stealing.

Now inked into his wrists where the triple band of a criminal signifying that he has committed his third and final offense, Hakuji was eventually banished from Edo, and in his rage he picked fights with people and beat them up, and that was when he met Keizou, the owner of a dojo with no students. Hakuji challenged him to a fight, but Keizo defeated him with ease. He then decided to take Hakuji under his wing so he could nurse Koyuki, Keizou's sickly daughter, after her previous caretaker (her mother) drowned herself due to stress. Hakuji ended up tending to Koyuki and indirectly motivated her by telling her that "there will be a next year" to see the fireworks. Three years later, she was in good health and could stand and do chores. In addition, he also trained as Keizou's pupil of the Soryu style, which healed his soul.

Eventually, Keizou asked Hakuji to take over the dojo as well as taking Koyuki as a bride, to his surprise and embarrassment, he agreed to, vowing to himself that he would have two people to protect, even at the cost of his own life. At a festival, Koyuki told him of her past, asking if he was really okay with the proposal, to which he reaffirmed his vows to her, promising to protect her for the rest of his life.

However, on taking a short trip to visit the grave of his deceased father to inform him of his marriage, on his return, he saw people outside his home and immediately knew something was wrong. He was then informed that someone had poisoned the well from where Koyuki and Keizou drank water from, and that they were both dead, and assumed it to be the work of the nearby kenjutsu dojo who were never able to defeat Keizou or Hakuji.

Enraged, Hakuji went to that dojo and killed all sixty-seven members there with his bare hands, pulverising them to the point where almost all of the corpses were no longer recognisable in their original form. This incident caught Muzan's attention, wondering if a demon committed the massacre, disappointed to find out that it was but a human, Hakuji told him to move, but Muzan stabbed his face with his hand and gave him his blood, telling him that he intends to create 12 powerful demons, thus turning Hakuji, into the demon and one of the first members of the 12 Demon Moons known as Akaza.

Over the centuries, he lost his memories of the time he became a human, with only one single desire to become stronger despite not knowing the reason why he wanted to become strong. Also, as noted by Douma, he refused to ever eat women. Also, he was dispatched by Muzan for special missions only (such as searching for the Blue Spider Lily).

Red Light District Arc
Akaza appears before Muzan Kubitsuji and reports to him that he could not find the Blue Spider Lily and that he took down one of the Pillars.

Human Abilities
Peak Human Endurance - Prior to being transformed into a demon, Akaza (Hakuji) demonstrated superhuman endurance at the age of 11 as he endured beatings that could make a grown man go numb (100 beatings) thus earning the title of "Demon Child".

Superhuman Strength - At the age of 11, he was able to lay waste to grown men in a fight and at the age of 18, he was easily able to decapitate, dismember and mutilate people with his fists that even Muzan thought that it was a demon who performed these feats.

Soryu Style - A barefisted martial arts style taught to him by Keizo when he lived with him and took care of Koyuki. He used it to kill the kenjutsu students with ease and probably was the inspiration of his Destructive Kill Style used when he became Akaza.

Demon Abilities
Due to being a demon and being the Upper Moon Three of the Twelve Demon Moons of Muzan.Akaza possess incredible amounts of strength surpassing most demons in the series. He is shown to be able to fight equal grounds against Rengoku flame pillar and eventually land fatal blow on him. Later he is able to fight and overhelm both Tanjirou and Giyu even when Giyu gain mark and Tanjirou gain access too Further power from Dance of fire god, he still manage to overwhelm them and would most likely have killed both of them If he had not lost the will to continue fighting.

Regeneration- Akaza possess incredible regeneration able to regenerate from slash wounds inflict by Tanjirou and Rengoku with little effort and lost limbs inflict by Giyu with little efforts as well.And Later during his battle against Giyu and Tanjiro his regeneration evolved even further and he had became a demon that could no longer be killed via Decapitation a feat only Muzan has accomplished.

Blood Demon Technique : Akaza has unique ability called Technique Deployment. After deploying his technique, he can use his ability to create various shock wave-like attacks. He could also track his opponents by tracing their bloodlust

Destructive Kill:A Type of Marshal Art,Likely adapted from the Soryu Style hand to hand combat that he had mastered as a human now further enhanced with his abilities as a Demon.
 * Compass Needle - Deploying a compass underneath him with numbers from 1 to 10. It can detect all incoming attacks through sensing battle spirit.
 * Void Style - Punching the air, he creates a powerful multishot shockwave range attack.
 * War Style - Punching in front of him, he creates large shock waves that fly forward.
 * Obliteration Style - An explosive forward jump followed by a punch that was able to go through Kyoujurou Rengoku's Purgatory attack.
 * Leg Style - Techniques where he uses his legs to attack
 * Cap Tip Slice  - A reverse, rising axe kick he can use to attack behind himself.
 * Flowing Light Flash - Multiple, rapid straight kicks that each produce powerful shockwaves.
 * Ring of a Thousand Flying Planets - Rapid, flowing rising kicks that hit an opponent from below.
 * Dual Layered Demon Wick - He punches rapidly with both arms at once, each producing powerful shockwaves.
 * Crush Style - Techniques that involve crushing attacks from above.
 * Willow of a Thousand Flashes - A powerful downward punch that delivers a large shockwave into the ground, causing massive damage to the ground.
 * End Style - Powerful techniques. Presumably Akaza's strongest techniques.
 * Chaotic Blue Metal Afterglow - Incredibly strong and fast blows that attack from every direction at once almost randomly. They created seemingly thin, sharp shockwaves.

Trivia

 * Akaza was the only demon of the Twelve Demon Moons who refused to eat or kill women, and was given special permission to do so.

Quotes

 * "Elegant!! This is finely crafted swordsmanship! Splendid! Give me your name! What is it!? I want to remember you!" Chapter 148, page 10.
 * "Yes. I'm repulsed by weaklings. They make me vomit." Chapter 148, page 18.
 * "... I don— I... just don't care any... more..." Chapter 155, page 18. - When asked by Muzan if he could withstand his blood.
 * "But for over a hundred years, I kept pointlessly murdering over and over again. Yet, at the end of the day, it's just a pathetic, comical, uninteresting story." Chapter 155, page 19.

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