Chapter 10

[Template Name: Yoriichi Tsugikuni]

[Rank: ???]

[Type: Character Template]

[Description/ Capabilities]

Yoriichi Tsugikuni is a man originating from the world of Demon Slayer. He was a Demon Slayer who lived during the Sengoku era and is the most powerful Demon Slayer to have ever existed.

He is also the inventor of Breathing Styles, being the one who created the first ever Breathing Style, Sun Breathing.

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[Abilities]

Overall Abilities

Yoriichi is the strongest Demon Slayer in history, being born with the Demon Slayer Mark, access to the Transparent World, and Selfless State, as well as possessing a physique polished to the highest caliber and innate swordsmanship talent. As a seven-year-old child who had never picked up a sword before, he was able to defeat a trained sword instructor effortlessly he was referred to as a miraculous prodigy beyond compare. After training as a Demon Slayer, Yoriichi could defeat multiple demons to where his older brother stated that he as a child couldn't even compare to him as an adult.

[Genius Intellect]: As a child prodigy, Yoriichi is extremely intelligent. Despite not speaking for most of his childhood, his first words were very clear and pronounced. He also displayed maturity beyond his age as he noticed her mother's illness and helped her all the way till her death. As another testament to his keen intellect, he could immediately use the Transparent World in combat despite never fighting before, being able to intuitively figure out that the lungs of a person will expand before they attack and that he needed to watch their bone movement, muscle contraction, and blood flow, which he used to his advantage instantly in the midst of battle.

Even with just the knowledge of how to hold a sword properly and go into a stance, he was able to instantly overpower a trained sword instructor, causing him to go unconscious and inflicting many injuries all over his body. His unique intellect brought about the "Golden Age of the Demon Slayers" as he invented the Breathing Styles and modified the original Breathing Technique to suit the abilities and individual strengths of others. Furthermore, he was able to surmise that Muzan's weaknesses were his seven hearts and five brains and created an entirely new technique in that split second to overwhelm him.

[Demon Slayer Abilities]

Demon Slayer Mark: Yoriichi is the progenitor of the Demon Slayer Mark, being born with it, possessing the tremendous physical abilities granted by its effects all throughout his lifespan. Unlike all other users of the Marks in his era, Yoriichi was able to defy fate and lived to about 85 years of age. It is presently unknown why Yoriichi is immune to the Mark's effects, but it is presumably because he was the first one ever to have it and born with it naturally, unlike all other Mark bearers who must train to attain it.

Bright Red Nichirin Sword: Yoriichi is the first person ever to be able to turn his Nichirin Sword into a bright red colour, and he subsequently gave other users the ability to turn their blade bright red as well. When fighting, Yoriichi can turn his normally black sword bright red at will, allowing him to hamper the enhanced regeneration of demons, even Muzan's instant regeneration, burning him at a cellular level and leaving scars on his body for hundreds of years. It has also been noted by Muzan himself that Yoriichi's bright red blade was far more effective than those of the modern era Hashira and Tanjiro, as Yoriichi could completely negate Muzan's near-absolute regeneration for a short period of time while the Taisho era Demon Slayers can only slightly slow it down, despite the fact that Muzan was in a much weaker condition because of the Anti-Kibutsuji Drug.

Transparent World: Yoriichi had access to the Transparent World since birth, and could use it with incredible proficiency, evident when he could watch for lung expansions and muscle contractions within a person and surmise when to strike them, even as a child. This ability also granted him an advantage against Muzan, allowing him to find his weaknesses instantly and overwhelm him.

Selfless State: During their confrontation, Muzan noted that Yoriichi emanated absolutely no sense of drive, hatred, anger, fighting spirit, animosity or even bloodlust despite being in mid-battle against him, rendering it practically impossible for Muzan to detect him, predict his movements or gauge how powerful he was with his senses. This gave Yoriichi an edge in battle against Muzan as he underestimated his strength, a mistake that haunted the Demon King for the rest of his life.

[Physical Abilities]

Immeasurable Speed & Reflexes: Yoriichi possessed unparalleled levels of speed that surpass all other characters in the series, including that of the Demon King, shown when he was able to dodge every attack that Muzan launched at him and near-fatally injure Muzan with one move, despite the demon's own immeasurable speed and strength. Even when Muzan divided himself into 1,800 flesh pieces to escape, Yoriichi still managed to reduce the number down to 300 in mere moments.

Immeasurable Stamina & Endurance: Even as a seven-year-old child, Yoriichi could run for a whole day without rest; he even remarked that he didn't feel the least bit tired. His vitality is also beyond peak-human level, being able to survive without food or water for ten whole days when he was embracing his dead wife. Moreover, Yoriichi lived to his 80s without his power waning in the slightest, as shown when he instantly outmatched Kokushibo during their final confrontation.

Immeasurable Strength: Yoriichi possesses tremendous levels of physical strength possibly beyond that of nearly all other Demon Slayers in existence. As a child, he could knock out a grown man with inclined physical abilities with a wooden blade, even causing extremely severe bruises the size of fists. When he was an adult, he was able to effortlessly slice off the neck of Muzan Kibutsuji, the most fortified body part of the strongest demon in existence.

[Supernatural Abilities]

Extrasensory Perception: Outside of the sixth sense granted by the Transparent World which allowed him to see the inner workings of a person, Yoriichi also has extremely honed sensory abilities, able to detect things outside the normal range of perception. Like most high-level Demon Slayers, Yoriichi would be able to discern the aura of demons from humans while also being able to tell the strength of his enemies at a glance. During Yoriichi's first encounter with Muzan, he could immediately tell that, by destiny, he was born into this world to defeat him. Yoriichi was also able to accurately sense the Demon King's aura, which he described as magma erupting from a volcano.

[Fighting Style]

Unparalleled Swordsmanship: Yoriichi is the greatest swordsman to have ever lived. Even as a seven-year-old child with no training, he was capable of easily defeating a trained swordsman the very first time he ever picked up a sword, striking him in multiple areas across his body faster than the eye can process. His swordsmanship was so tremendous that a battle doll modelled after him had to be made with 6 arms wielding katanas and utilizing 108 techniques to even attempt to imitate Yoriichi's skills, and even then, the doll was still vastly inferior compared to him. His swordsmanship easily overwhelmed the Demon King, Muzan Kibutsuji and he would have killed his twin brother, Kokushibo, the strongest swordsman in the current era, if he didn't die of old age.

[Breathing Style]

Sun Breathing: Created by Yoriichi himself as the original Breathing Style which all other subsequent styles would be modeled after and was later replicated by Sumiyoshi Kamado who called it Hinokami Kagura. Yoriichi was incredibly proficient and unrivalled in his Sun Breathing, being able to take down demons effortlessly and even overwhelm the Demon King and the strongest Upper Rank. When looking through the memories of his ancestor, Tanjiro remarked that when Yoriichi performed the techniques of Sun Breathing, the forms were so strikingly beautiful and breathtaking, that he appeared more like a spirit than a man. Even after watching Yoriichi perform Sun Breathing first-hand, it's been noted by Muzan that Tanjiro's techniques were still far inferior to Yoriichi's.

[Techniques]

First Form: Dance - The user performs a singular downwards vertical slash in an arcing motion.

Second Form: Clear Blue Sky - The user spins and twists their upper body in a circular motion, releasing a 360° slash.

Third Form: Raging Sun - The user unleashes two consecutive horizontal arcing slashes around themselves to strike incoming attacks.

Fourth Form: Burning Bones, Summer Sun - The user performs a singular slash utilizing a spiralling motion which extends in front of themselves to defend from imminent frontal attacks.

Fifth Form: Setting Sun Transformation - The user backflips into the air before performing a singular horizontal slash which aims to decapitate the target.

Sixth Form: Solar Heat Haze - The user rushes forth, now attempting to deliver a strike seemingly enveloped in a heat haze, masking the true length and location of the blade to deliver an unexpected strike.

Seventh Form: Beneficent Radiance - The user spirals into the air whilst performing a swirling slash upwards to strike the target.

Eighth Form: Sunflower Thrust - The user performs a singular thrust utilizing the tip of their blade to strike the target.

Ninth Form: Dragon Sun Halo Head Dance - The user assumes a high stance, before unleashing a number of consecutive slashes in a fluid motion in the form of a Japanese dragon made of solar flames. This technique is capable of decapitating multiple targets at once.

Tenth Form: Fire Wheel - The user flips into the air behind the opponent before unleashing a singular vertical slash in a circular motion to swiftly cut the target in half.

Eleventh Form: Fake Rainbow - The user performs high-speed twists and rotations, thus creating afterimages used mostly to evade attacks. The afterimages work most effectively on enemies with sharp vision.

Twelfth Form: Flame Dance - A two-combo strike which starts with a vertical slash leading into a horizontal slash right after.

Thirteenth Form - The user continuously performs all twelve forms of Sun Breathing in repetitive succession to increase the accuracy and agility of their movements and attacks. This form was created solely for the purpose of killing Muzan Kibutsuji, since the repetition of all twelve forms aims to destroy Muzan's twelve vital organs (seven hearts and five brains) that move freely inside his body.

[Equipment]

Standard Nichirin Katana: Yoriichi carries around a standard-sized and shaped Nichirin katana that is deep black in colour, but changes bright red during combat. His katana's hilt is circular shaped with 4 slight indentations, with a black center and a golden border. Yoriichi's katana also has the words Slay engraved on the side. Along with his katana, Yoriichi also carries a standard sword sheath that is black in colour.

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