Akaza

Akaza is a member of the Twelve Kizuki, holding the position of Upper Rank 3. When he was human, his name was Hakuji.

Appearance
As a Demon, Akaza took the form of a muscular young man with skin so fair that appears bright green-tinged white, decorated by a pattern of thick blue lines, which resemble the criminal tattoos he had as a human. 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 center 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 there also repeating around his waist.

On his arms there were lines running down the front of his shoulders that ran into to two more, which went around his biceps, before continuing to run down to his wrists, below which it could be seen that each of his fingers is also dark blue with an orange fingernail, his toes also sharing this unusual appearance.

Akaza had short, bright pink hair that fluffed out around his head, and inward-tilting yellow eyes with pink eyelashes and blue sclera that looked somewhat like cracked glass, the kanji for "Upper Rank Three" etched into their irises.

He wore little, only sporting a short, sleeveless dark purple-pink haori that was cut off at his waist, left open to expose his chest, that was 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 blue rope belt to secure them at his waist. Akaza prefers to go barefoot, but wears a chain of large round pearls around each of his ankles.

During his human days as Hakuji, he had the same hair, just colored black rather than pink, and pale blue eyes with unusually-colored pink eyelashes. He was also very muscular as a human, and, on each of his forearms, he bore three black criminal tattoos.

He wore a dark blue-gray yukata.

Personality
Akaza is a strong, stubborn and impulsive Demon who enjoyed fighting, especially strong Demon Slayers. He looked down on anybody he deemed weak, but genuinely respected those who were strong in his eyes, regardless of their race. Once he met someone he deems strong, he demanded to know their name, and would not stop until he finds out; he remembers all the names he's committed to memory as tribute to their strength.

Akaza had a deeply-rooted psychological need to become stronger, and did not get along with his fellow Upper Ranks due to him seeing them as his rivals. He is especially antagonistic towards and even appeared jealous of the two Upper Rank above him, Doma and Kokushibo, lashing out at Doma and vowing to kill Kokushibo. Even after being beaten down and beheaded during his fight against Tanjiro Kamado and Giyu Tomioka, he stubbornly held on and continued to fight despite not even knowing why he wanted 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 hated himself for having a life "full of empty words and promises." Even after becoming a Demon and losing his memories of his human life, parts of Hakuji's memories influenced Akaza's decisions; he refuses to eat women, despite knowing it would make him stronger if he did so. His hatred of weak, cowardly people stemmed from a corruption of his human memories, where a rivaling dojo poisoned his dojo's well because they were never able to beat him.

Later after remembering the entirety of his past and all of his regrets as a human and demon, Akaza was shown to have openly begun hating himself and all of his shortcomings during his life where he wasn't there to save or protect everyone that he loved and cared for and later admitted that the person he really wanted to kill all along was himself.

Abilities and Powers
As he is the holder of the 'Upper Rank 3' title, Akaza possessed a tremendous amount of strength, having been able to defeat Kyojuro Rengoku, the Flame Hashira, and also several past Hashira, according to what he stated. Later, he is able to fight and overwhelm both Tanjiro and Giyu, even when they were both using their Demon Slayer Marks and Tanjiro was using the Hinokami Kagura requiring him to access the "Transparent World" in order to behead him. If not for Akaza losing his will to continue fighting, he would have certainly killed both of them. In a further testament to his might, he is capable of becoming the holder of the Upper Rank 3 title and the fourth-strongest Demon in the series without killing or eating any women, which would've hindered his growth as a Demon drastically. It can be safely assumed that Akaza would've been far stronger and likely surpassed Doma in rank if not for him limiting his killings only to men.

Human Abilities

 * Supernatural Martial Arts Skill: Akaza's main ability as a human and as a demon is his supernatural skill in unarmed combat. Even before transforming into a demon, Akaza has displayed his prodigious abilities in various forms of close ranged combat, being able to intuitively create his own fighting style which was shown to completely law waste to several grown men at the age of 11. After becoming a demon, this skill was further augmented to the point he could effectively fight at subsonic speeds while fully utilizing his martial arts skills for both offense and defense.
 * Soryu Style: A bare-fisted 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 it is presumably the inspiration of his Destructive Kill Style used when he became Akaza.
 * Bell Crusher: This is a technique that Akaza created himself. The user punches the sword from the side as it comes down.


 * Enhanced Strength: At the age of 11, he is able to lay waste to grown men in a fight and at the age of 18, he is easily able to decapitate, dismember and mutilate 67 armed adult kendo masters with his bare fists, to the point that even Muzan thought that it is a Demon who performed these feats.


 * Enhanced 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."

Demon Abilities

 * Shockwave Manipulation: Akaza's main ability as a demon is to generate and manipulate shockwaves from the sheer pressure caused by his attacks. Akaza incorporates this ability and his supernatural skill in martial arts, allowing him to easily overwhelm his opponent's in both ranged and hand-to-hand combat.


 * Supernatural Physical Prowess: As one of the strongest upper moons, Akaza's physical capabilities have been augmented to supernatural levels due to the high concentration of Muzan's blood present in him.
 * Immense Speed: Akaza is extremely fast, as shown during his fight with Kyojuro when Tanjiro states that they were moving so fast his eyes couldn't follow their movements.
 * Immense Strength: Akaza possessed tremendous physical strength, as shown when he easily breaks Giyu's sword in half with a single side punch despite the latter swinging his blade down. he is able to easily destroy Doma, Upper Rank Two's, head with his arm and easily pierce through Kyojuro's stomach. With his Blood Demon Art, he is capable of causing a crater on the ground by punching it.
 * Enhanced Regeneration: Akaza possessed incredible regeneration. He is able to regenerate from slash wounds inflicted by Tanjiro and Rengoku and even lost limbs inflicted by Giyu with little effort. During his battle against Giyu and Tanjiro, his regeneration evolved even further. He is able to survive even after having his head cut off and then is able to regenerate a new one, a feat only Muzan had accomplished beforehand.


 * Indomitable Will: Akaza posed an extended willpower to keep fighting, even in spite of whatever damage he sustained. Despite being beheaded by Tanjiro's Nichirin Blade, he refused to disintegrate and die, instead forcing his headless body to keep fighting. He pushed his regeneration to evolve to the point where he could regrow his head, all because he simply refused to allow himself to lose.

Blood Demon Art: Akaza has a unique ability called Technique Development. After deploying his technique, Akaza uses his martial arts skills in conjunction with various shock-wave like attacks. He can also use his ability to sense and track bloodlust.


 * -|Attacks=
 * Destructive Kill: A type of Martial arts that combines Akaza's shockwave manipulation ability and his supernatural unarmed combat prowess, likely adapted from the Soryu Style hand to hand combat that Akaza 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 and track the locations of his opponents and incoming attacks through sensing a person's will to fight.


 * Air Type: Akaza punches the empty air, creating a powerful shockwave from the pressure created from his fists and then sends it flying towards his enemies. These airborne shockwaves can be created multiple times and has been noted to travel at less than a split second.


 * Disorder/Chaotic Type: Punching in front of him, Akaza creates a barrage of chaotic ranged shockwaves capable of overwhelming Kyojuro Rengoku.


 * Annihilation Type: One of Akaza's most powerful techniques. Akaza lunges forward, punching with so much force it creates a shockwave that decimates the surroundings and is capable of overwhelming Rengoku's most powerful attack.


 * Eight-Layered Demon Core: Akaza punches eight times, each attack creating powerful shockwaves similar to his Disorder/Chaotic Type technique.


 * Leg Type - Techniques where he uses his legs as the main form of attack.
 * Cap Tip Slice: A reverse, rising axe kick that creates a powerful shockwave.
 * Flowing Light Flash: A flashing flurry of powerful straight kicks, each creating powerful shockwaves capable of launching a person a great distance.
 * Flying Planet Thousand Wheels: Akaza kicks in a flowing motion from under his opponent that slowly rises upward.


 * Crush Type: Techniques that solely involve attacks of brute force that pulverize the enemy.
 * Ten Thousand Leaves Flashing Willow: A powerful downward punch that delivers a large shockwave into the ground that expands outward, causing a massive crater.


 * Final Form: Blue Silver Chaotic Afterglow: Possibly Akaza's strongest technique. Akaza creates an omni-directional barrage of thin and sharp shockwaves that seemingly strike out of nowhere from a flurry of punches. This attack was so overwhelming it could negate Giyu's Eleventh Form.


 * -|Demonstrations=

Trivia

 * Akaza was the only Demon of the Twelve Kizuki who refused to eat or kill women, and was given special permission to do so.
 * Akaza was one of Muzan's favorites since he was loyal and serious.
 * Akaza's Technique Deployment ability forms the shape of a snowflake; possibly due to the influence of his fiancée (Koyuki's name contains the kanji for "snow", and she wears three snowflake-shaped hairpins).
 * Many of Akaza's attacks and techniques are named after fireworks, a reference to his promise to Koyuki to see the fireworks.
 * Akaza is the only member of the deceased Upper Ranks who encountered the people he knew in life while disappearing. There are two members of the Twelve Kizuki who have been shown experiencing this, the other being Rui.
 * Akaza is the fourth Demon who was able to overcome Muzan's influence over himself by willing himself to stop regenerating and die, the other three being Tamayo, Nezuko Kamado and Kokushibo.

Quotes

 * (To Giyu Tomioka) "Elegant!! That's developed sword technique! Wonderful! State your name! What is your name?! I want to remember it!"
 * (When Muzan Kibutsuji offers to turn him into a Demon) "Don't... care... anymore. I don't care... about... anything."
 * (About himself) "For over a hundred years I committed pointless acts of carnage. It's a horribly sad... laughable... and ridiculous story."
 * (To Koyuki) "Forgive me! Forgive me! I'm sorry I couldn't protect you! I'm sorry I wasn't with you when you needed me! I couldn't keep... a single promise!! Forgive me! Please forgive me!"

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