Kazuhirō Sasaki

**Kazuhirō Sasaki** (佐 (さ) 佐 (さ) 樹 (き)  和 (かず) 洋 (ひ) 郎 (ろう) , *Sasaki Kazuhirō*?) is a Demon Slayer and the Darkness Hashira of the Demon Slayer Corps.

## Appearance

Kazuhirō .

Kazuhirō wears a black version of the standard Demon Slayer uniform, comprised of a gakuran jacket and hakama pants.

## Personality

Kazuhirō is a calm, confident man. He's often gruff and blunt, saying what he thinks with no hesitation, so people often think he's mean. He's quite cold and chilly. It's easy to get him off balance, making him aggressive as well as snout. Kazuhirō is quite heavy in character, he doesn't show that he cares about anything, but when he sees someone need help, he gives a helping hand. Although sometimes it looks like he's more likely to kill someone than help.

### Physical Abilities

* **Enhanced Physical Prowess:** As a member of the Hashira, Kazuhirō's physique has been increased to superhuman levels through years of harsh training combined with the use of the **Total Concentration: Constant** (全 (ぜん) 集 (しゅう) 中 (ちゅう) ・常 (じょう) 中 (ちゅう) , *Zen Shūchū Jōchū*?). The members of the Hashira in general have incredible movement speed, all of them have displayed the capability to use blinding bursts of speed that make it seem like they teleported to even talented swordsman like Tanjirō Kamado.

### Mental Abilities

* **Enhanced Mental Prowess:** As a seasoned swordsman who underwent incredibly harsh and intense training, Kazuhirō possesses above average mental capabilities. He could process information and think clearly at supernatural speeds, proven by fighting Upper Rank Demons, who can think at equally or slightly faster speeds. As another testament to his mental capabilities, he has incredible concentration abilities and wits. With an arsenal of techniques at his disposal, Kazuhirō has to be really decisive and sagacious when using them, proven when he could hold his own against "an Upper Rank" and Muzan Kibutsuji himself.
	+ **Keen Intellect:**

### Supernatural Abilities

* **Demon Slayer Mark:** .
	+ **Bright Red Nichirin Blade** (赫 (あか) く日 (にち) 輪 (りん) 刀 (とう) , *Akaku Nichirin To*?): .

### Swordsmanship

* **Master Swordsman:**

**Darkness Breathing** (闇 (やみ) の呼 (こ) 吸 (きゅう) , *Yami no kokyū*?):

1. **First Form: True Final Slash** (壱 (いち) ノ型 (かた)  本当 (ほんとう) 最 (さい) 終 (しゅう) 的 (てき) 嶄 (ぎ) り, *Ichi no kata: Hontō Saishū-teki Giri*?) - Kazuhirō executes a lightning-fast dash, moving with extraordinary speed and agility. With unrivaled precision, he unleashes a devastating and lethal slash that can swiftly eliminate any unprepared demon unfortunate enough to be its target.
2. **Second Form: Dark Vortex** (弐 (に) ノ型 (かた)  闇 (やみ) 渦 (か) 動 (どう) , *Ni no kata: Yami Kadō*?) - Kazuhirō swings his blade in a circular rotation similar in appearance to the **Flame Breathing: Fourth Form - Blooming Flame Undulation**. However, instead of blocking enemy attacks or beheading multiple demons, the swordsman changes the grip so the current of air sucks in enemies to close in on distance in order to give a chance to behead the demon.
3. **Third Form: Entropy** (参 (さん) ノ型 (かた)  均 (きん) 衡 (こう) , *San no kata: Kinkō*?) - Kazuhirō envelops himself within a shroud of dense, impenetrable darkness, effectively concealing his presence from any potential attacks. Within this veil of obscurity, he remains undetectable and prepares to execute a devastating maneuver. In an instant, Kazuhirō emerges from the concealed darkness, materializing directly in front of his intended target. Swift as a phantom, he unleashes a mighty strike, directed precisely at the target's chin. This powerful blow possesses not only physical force but also the ability to drain the target's energy, leaving them weakened and vulnerable.
4. **Fourth Form: Black Hole** (肆 (し) ノ型 (かた)  黒 (くろ) い孔 (あな) , *Shi no kata: Kuroiana*?) - Kazuhirō employs a swift and precise motion, causing his katana to execute a seamless 360° rotation. As his blade completes this rotation, a dense cloud of darkness materializes in front of him, forming a potent protective barrier. This defensive technique possesses the unique ability to absorb incoming attacks, rendering it invaluable in thwarting enemy offensives.
5. **Fifth Form: Dark End** (伍 (ご) ノ型 (かた)  闇 (やみ) 果 (は) てる, *Go no kata: Yami Hateru*?) - Kazuhirō seamlessly melds with the shadows, becoming one with the darkness that surrounds him. Concealed within this ethereal realm, he prepares to unleash a swift and relentless assault upon his target. From within the obscurity, he strikes with blinding speed and precision. Emerging from the depths of the shadows, Kazuhirō launches a series of rapid slashes, his blade moving with incredible agility and dexterity. Each strike is executed with utmost accuracy, aimed at vulnerable points on the target's body. The darkness serves as both his cloak and ally, granting him an element of surprise and making it difficult for his opponents to anticipate his movements.
6. **Sixth Form: Liberation of our World** (陸 (ろく) ノ型 (かた)  世 (せ) 界 (かい) 解 (かい) 放 (ほう) , *Roku no kata: Sekai Kaihō*?) - To utilize this technique, Kazuhirō must have attained an exceptional level of skill and strength, having successfully defeated an Upper Moon 1 demon. Harnessing his formidable abilities, he delves into the shadows, ready to execute a devastating series of strikes. With masterful precision, Kazuhirō unleashes a barrage of slashes targeted at multiple demons simultaneously. Each slash is executed with lethal accuracy, aiming specifically at the neck of his adversaries. The combined force of these strikes is intended to incapacitate or eliminate the targeted demons all around the globe

## Battles

Kazuhirō Sasaki Battles

**Infinity Castle Arc**

* Demon Slayers vs Muzan Kibutsuji

**Sunrise Countdown Arc**

* Demon Slayers vs Muzan Kibutsuji and Kokushibō

* Battle under Natagumo Summit (vs Upper Rank)

## Trivia

* Kazuhirō makes complicated medications, ointments that help Demon Slayers heal wounds more efficiently, or even for various types of ailments. Some products are only for demons or only for humans. ￼
* Kazuhirō and his sister Ayaka were brought up alone by their mother. Their father died fighting to defend his family when she was attacked by a demon. He was a Demon Slayer of the rank of Kinoe. At the age of 10 they were separated, Ayaka was kidnapped and presumed killed. And Kazuhirō is left alone with his mother, who was killed a week later too.￼
* He saved two demons, Amane and Jun'ichirō. That way he knows how to help demons. And how to mitigate certain aspects of their nature. So they can at least function as normal as possible. Jun'ichirō is an example. Amane helped him a little bit.￼