Kyojuro Rengoku

> Life is a series of decisions. You never have unlimited options or unlimited time to think, but what you choose in that instant defines who you are. Warriors who strive to save other people's lives are precious. Their pure and single-minded dedication is separate from their natural talent. They don't risk their lives to earn praise. They simply feel that they must. What they choose in that moment, is a cry from the depths of their souls. Isn't that right... my friends?
>
> Kyojuro Rengoku

## Summary

Kyojuro Rengoku (*Rengoku Kyōjurō*) was a major supporting character of *Kimetsu no Yaiba* and a major character in the Infinity Train Arc. He was a Demon Slayer of the Demon Slayer Corps and the last Flame Hashira (*En Bashira*).

He was the eldest son of Shinjuro Rengoku & Ruka Rengoku. His father was known as the Flame Hashira of the Demon Slayer Corps until his unexpected retirement for unknown motives. Kyojuro also had a younger brother, Senjuro, who trained alongside him until their father stopped to teach them. Kyojuro and Senjuro lost their mother sometime after she gave birth to Senjuro due to having developed an untreatable disease and being left bedridden up until her death. Despite his father having stopped teaching him, Kyojuro trained hard by himself to reach the position of a Hashira, using the guidebook of the Breath of Flames style, a book which had only 3 volumes. After reaching the rank Kinoe, the highest Demon Slayer rank (below Hashira), he defeated the Former Lower Moon 2, Hairo, and became the Flame Hashira of the Demon Slayer Corps after the respective battle.

## Powers and Stats

**Tier:** At least **8-C** | **8-B** At Full Power

**Name:** Kyojuro Rengoku

**Origin:** Kimetsu no Yaiba

**Gender:** Male

**Age:** 20

**Classification:** Human, Demon Slayer, Flame Hashira

**Powers and Abilities:**

* Abilities
* Resistances

* **Superhuman Physical Characteristics**
* **Acrobatics**
* **Body Control**
* **Regeneration** (Low; With Total Concentration Breathing, one can stop hemorrhages)
* **Extrasensory Perception** (Able to sense the presence of others and malicious intent. Was able to figure out that Shinobu and Kanae are sisters judging by their aura, this can be used to differentiate humans and demons, determine how strong someone is to a certain extent or detect an enemy in the vicinity. He took note of the Pillars' aura shortly before he became a Hashira himself. Sensed a girl with no killing intent who tried to destroy his spiritual core. Muzan stated that Hashiras could detect an Upper Moon in the Red Light District right away)
* **Battle Spirit** (Overwhelming Aura that causes the opponent fear and paralysis with them feeling the air getting heavier, and can even cause internal bleeding and external lacerations)
* **Supernatural Willpower** and **Awakened Power** (Was able to surpass his normal power while fighting Akaza despite being exhausted and suffering from broken rips and injured organs. Remembering his mother's words while fatally pierced through the torso allowed him to surpass his limits near death, which allowed him to hold Akaza in place despite his severe injuries and almost slice his head)
* **Statistics Amplification** (Total Concentration Breathing increase the user's speed and power to match demons.)
* **Instinctive Reaction** (Comparable to Mitsuri, Sanemi, and Giyu who can react instinctively)
* **Master Swordsman** (Is one of the strongest and most skilled swordsmen in the entire Demon Slayer Corps. Can match opponents with over a century worth of combat experience. His swordsmanship amazed Tanjiro and Akaza complimented his swordsmanship skill)
* Sunlight **Absorption** (The ore of his katana (Scarlet Crimson Ore) absorbs sunlight. The amount of sunlight his weapon has absorbed is so great that Kokushibo's katana would burn and break off before it could cut through)
* **Perception Manipulation** (Users of Breath Styles can create seemingly elemental effects. Yoriichi can make others see fire and feel the opponent like he's burning)
* **Shockwave Generation** (Breath Styles allow sword forms to strike from a longer distance)

**Resistance** to **Fire Manipulation**, **Water Manipulation** and **Heat Manipulation** with Demon Slayer Corps Garbs (Demon Slayer Corps Garbs protect against fire, water, **Poison Manipulation** (Total Concentration Breathing grant resistance to poison and the ability to slow its circulation), **Biological Manipulation** (Users of Total Concentraton Breathing are resistant to Muzan's blood which can immediately transform normal humans into demons with a scratch, leading them to require a few days to willingly transform. Can resist Muzan's injected blood which rapidly attacks and destroys cells leading to quick melting and vaporization, especially with the Demon Slayer Mark), **Pain Manipulation** (Fought with no signs of pain despite having his left eye smashed, ribs broken and organs damaged), **Fear Manipulation** and **Paralysis Inducement** (Giyu be unaffected by the aura of Lower and Upper Moons like Rui which caused intense shuddering and lack of air), **Air Manipulation** (Superior to Tanjiro who was unbothered by the Swamp Demon's pocket dimension that has almost no air)

**Attack Potency:** At least **Small Building Level** (Fought with, and eventually defeated Hairo, who's superior to Rui but inferior to Enmu in power) | **City Block Level**, likely **City Block+ Level** (Can lift an entire train off its tracks by simply dashing forward. Impressed a non-serious Akaza and is comparable to him. Cut Akaza's neck halfway. Akaza compares him to Marked Tanjiro and Giyu. Tengen believes him, Muichiro and Gyomei to be stronger than him) | Full Power: **City Block+ Level**

**Speed:** At least **Supersonic+** , saved Mitsuri Kanroji from a bullet comparable to a sniper bullet, casually dodged Hairo's gunshots and blitzed him before he became a Hashira. | **High Hypersonic+** to **Massively Hypersonic** (Kept up with a non-serious Akaza. | Full Power with 9th Form: **Massively Hypersonic**

**Lifting Strength:** At least **Class 25** (Superior to Rui and above Post-Rehabilitation Tanjiro and Inosuke) | At least **Class 25+**, at most **Class 50** (Despite being heavily injured, he stopped a punch from Akaza who considered Kyojuro's strength as unbelievable due to his injuries. Comparable to Giyu but weaker than Gyomei)

**Striking Strength:** At least **Small Building+ Level** | **City Block Level**, likely **City Block+ Level**.

**Durability:** At least **Small Building Level** | **Building Level**, likely **City Block Level** (Survived multiple attacks from a non-serious Akaza).

**Stamina:** **Superhuman**. Superior to Tanjiro who endured extremely taxing training for seven days non-stop with no food, no sleep, and only a small amount of water from rain, later drained for even greater stamina, was also getting injured frequently during the training session. Far superior to Inosuke who can hunt for 3 days. Comparable to fellow Hashiras who fought Lower Moon-level demons in the Dimensional Infinity Fortress for nearly 5 hours on top of fighting Upper Moons. In his Special One-Shot, Kyojuro ruptured his eardrums, yet didn't flinch in the slightest, ignoring the pain and continuing to fight and win. In Kyojuro Rengoku's Story, he suffered dozens of severe wounds and injuries from gunshots and explosions coming from the former Lower Moon 2, Hairo, but continued to stall enough time for all the bombs he planted to be disarmed without showing any signs of pain or fatigue, which shocked Hairo, who questioned himself on whether the person he met in the past was really the same person he was fighting now. Furthermore, his battle against Enmu when he fused with an entire train, he was able to keep him at bay in 5 different train carts without tiring.

Lastly, he managed to keep up with a non-serious Akaza, one of the strongest demons in existence despite physically and mentally exert himself beyond his limit and sustaining multiple irreparable and fatal wounds, like a smashed eye, shattered ribs and damaged internal organs. Most impressively, he managed to keep Akaza at bay despite having his vital spot, his Solar Plexus, pierced by the Upper Moon's arm and bleeding out.

**Range:** **Extended Melee Range**, Several Meters with his Breathing Style.

**Standard Equipment:** Standard Nichirin Katana (A blade made from metals that absorbed the light of the sun, they cause demons to completely disintegrate if they are decapitated with them, as they are weak to sunlight, which in the case of demons which have assumed a form where they don't have a neck or head in the traditional sense can be done by slicing something that's equivalent enough to the neck, demon limbs that are sliced off and constructs created through Blood Demon Arts that are bisected through a Nichirin sword are also subject to the disintegration, Stabs and slashes with a Nichirin sword can dispel the effects of Blood Demon Arts and can temporarily weaken a demon's power and abilities if directed at the neck), Demon Slayer Corps Garbs (Protects from the claws and slashing attacks from weaker demons, and resistance against fire, water and cold)

**Intelligence:** Gifted (As a swordsman who came from a lineage of Flame Hashira, Kyojuro had access to generations of combat knowledge and tactics as well as training from previous Flame Hashira, like his father, Shinjuro Rengoku. Kyojuro could also master the entire Breath of Flames style just from reading 3 volumes of a book on it. During the battle against Akaza, he displayed keen judgement like after being attacked by Akaza's **Destructive Death: Air Type**, he realizes that he must fight at close range with he wanted to increase the chances of cutting of his head. Even when the usually deductive and sagacious Tanjiro Kamado was at a loss of how to kill Enmu, Kyojuro instinctively knew that, no matter what form a demon takes, it will always have a weak spot.

He also possesses great knowledge in the use of the Total Concentration Breathing, knowing how to plug minor wounds and hemorrhaging and saved Tanjiro from dying of blood loss. As another testament to his tactical intellect, Kyojuro could instantly read his allies' sign language at indicating the Flute Demon's abilities despite being unable to fully control their movements and execute a countermeasure before the demon's Blood Demon Art befell him)

**Weaknesses:** One of his ear drums is heavly damaged, this being the reason why he talks so loudly.

**Notable Attacks/Techniques:**

**Breath of the Flame**: A Breathing Style that mimics flames and replicates it with the user's movements, techniques and abilities. Most, if not all, known techniques and forms involve extremely powerful singular strikes which **burn** their opponents, with most attacks being initiated from a high stance. Users of Flame Breathing aswell as their opponents also visualize themselves seemingly creating and manipulating fire when unleashing its techniques.

This Breathing Style was taught to him by the previous Flame Hashira, Shinjuro Rengoku, and he later learned most of it's other forms by reading the instruction books left behind by previous Flame Hashiras in the Rengoku Family. Kyojuro became extremely proficient in fighting with this Breathing Style, being able to go toe-to-toe with the Former Lower Moon 2, Hairo, and later Upper Moon 3, Akaza.

**First Form: Unknowing Fire** ( Ichi no kata: Shiranui ) - The user charges towards their opponent at high speed and decapitates them in one slash.

**Second Form: Rising Scorching Sun** ( Ni no kata: Nobori En Ten ) - The user releases an arching slash attack upwards. Kyojuro used this technique to slice Akaza's arm in half.

**Third Form: Blazing Universe** ( San no kata: Kien Banshō ) - Kyojuro swings his blade downwards in an arc.

**Fourth Form: Blooming Flame Undulation** ( Shi no kata: Sei En no Uneri ) - The user swings their blade in a circular motion that can defend them from all incoming attacks or decapitate multiple enemies at once. Kyojuro used this technique to deflect several of Akaza's shockwaves.

**Fifth Form: Flame Tiger** ( Go no kata: Enko ) - The user unleashes a powerful series of sword slashes that takes the form of a rampaging tiger engulfed in flames that charges towards the enemy at blinding speeds. Kyojuro used this technique to rival Akaza's War Style.

**Ninth Form: Purgatory** ( Ku no kata: Rengoku ) - A devastating dashing slash that the user initiates from a high stance, the technique had enough power to carve a deep impression that burnt the ground where it was unleashed. Before Kyojuro used this technique, he remarked to himself about "thoroughly hollowing out most of the area".

Unknowing FireRising Scorching SunBlazing UniverseBlooming Flame UndulationFlame TigerPurgatory