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According to the fandom, Takeshi Hayate is the very first Wind Hashira in the history of the Hunter Organization (First ever Wind Hashira). In these chronicles, his image bears striking parallels to the canonical Wind Hashira of modern times, Sanemi Shinazugawa, sharing his fiery temperament and reckless fighting style.
Build: Tall, athletic and muscular man, approximately 189 cm tall and weighing approximately 80 kg.
Face and Hair: He has long, wavy black hair with a green tint, with several streaks of gray or white visible in the strands. His eyes are wide and dark green. He has numerous scars on his face and body, including a large X-shaped scar on his chest, left over from a brutal battle with a demon.
Clothing: He wears a dark green version of the standard fighter uniform. He never fastens it at the chest, revealing the muscles and scars he's incredibly proud of.
Fighting Style: While other warriors fight with a cold, clear mind, Takeshi fights in a state of all-consuming rage. His attacks are sharp, unpredictable, and furious, like a destructive storm.
Weapon: Depending on the version of the fanfic, he uses a Nichirin katana with a green blade or a more massive slashing weapon capable of cutting through the air and creating directed wind currents.
Aggression and stubbornness: He's rude, quick-tempered, incredibly stubborn, and always ready to pick a fight at the slightest provocation. It's easy to anger him. He treats everyone around him with cold indifference.
Hatred of Demons: He harbors a profound, fanatical hatred of demons and is absolutely convinced that humans and monsters can never coexist. His endless anger is fueled by a tragic past: demons destroyed his village and killed his master at the dojo.
Hidden Side: Despite his rude and repulsive demeanor, he has good intentions, which are simply "burned to ashes" by his constant rage. Interesting fan-made detail: Takeshi is very bad with people, but he loves animals.

Enjuro Rengoku (煉獄 炎柔郎) is the Flame Pillar, the wisest of all the Pillars.
Face and Hair: A young man in his 20s with flaming, bright yellow hair streaked with red at the ends. He has the same expressive, wide-open golden eyes and thick, forked eyebrows as his distant descendant, Kyojuro Rengoku.
Clothing: Wears a traditional fighter uniform, and over it a white haori with a flame pattern on the hem (the same family haori that has been passed down in their family for generations).
Style Basis: He was a close friend of Yoriichi Tsugikuni and attempted to master the Breath of the Sun. The heat of this style proved too destructive, so under Yoriichi's guidance, he modified the technique, transforming it into the Breath of Flame, creating all nine canonical forms.
Weapon: Classic Nichirin katana with a fiery red blade and flame-shaped guard.
Strength: Fan stories describe him as one of the most skilled and disciplined swordsmen of his time, whose strikes could literally sear the flesh of demons.
Eccentric Goody-two-Shoes: He is incredibly cheerful, loud, optimistic, and often comes across as a bit "quirky" to others due to his excess energy.
Pure Heart: Has a heightened sense of justice and truly loves people, considering it his duty to protect those who are weaker.

Michikatsu Tsugikuni (継国 厳勝) is an official, canon character in the Demon Slayer universe and the older twin brother of Yoriichi Tsugikuni.
Face and Hair: A tall, stately samurai with long black hair that shaded to a deep red, which he wore in a ponytail. Unlike the aloof and calm Yoriichi, Michikatsu's gaze always expressed sternness, pride, and hidden anxiety.
Clothing: He wore an expensive traditional purple kimono with patterns and black hakama pants, emphasizing his high status as a samurai and clan leader.
The basis of the style: He tried to master his brother's Sun Breathing, but couldn't cope with its heat. Michikatsu eventually created his own offshoot, which imitated the cold, fickle light of the moon.
Specialty: His attacks had a huge range. With each swing of his sword, dozens of chaotically moving, razor-sharp crescent moons of varying sizes materialized in the air, making them virtually impossible to dodge.
Weapon: In his human years, he wielded a standard Nichirin katana. After becoming the demon Kokushibo, he transformed his sword, growing it from his own flesh and bones, and peppered the blade with a multitude of living eyes. Childhood and Envy: Michikatsu grew up as the family's legitimate heir, while Yoriichi was treated as a servant due to a strange mark. Michikatsu pitied his brother and even gave him a homemade flute. However, when, at age seven, Yoriichi instantly defeated their fencing master without preparation, a burning, suffocating envy was born in Michikatsu's heart.
Adulthood and Salvation: Michikatsu grew up, became a respected samurai, and had a wife and children. But one day, a demon attacked his camp. His entire retinue was slaughtered, and Michikatsu himself survived only because Yoriichi suddenly appeared and destroyed the monster in a split second. Overwhelmed by his brother's strength, Michikatsu abandoned his family and title to become a Hunter and equal his brother.
Awakening of the Mark: Michikatsu trained hard and was able to awaken the Demon Slayer Mark.

Yoriichi Tsugikuni (継国 縁壱) is the official, canon, and strongest character in the entire story.
He lived about 500 years ago during the Sengoku era and is the creator of the Breath of the Sun, the very first breath from which all other fighting styles originated.
Face and Hair: He has long black hair with dark red tips, which he always wears in a high ponytail.
Distinguishing marks: Since birth, the Demon Slayer's Mark, in the form of flames, has burned on the left side of his forehead. He wears the famous Hanafuda earrings, which were later passed down to the Kamado and Tanjiro families.
Clothing: Wears a yellow-orange kimono, black hakama pants, and a bright red haori.
Breath of the Sun (日の呼吸): A primordial style that mimics the blinding power and heat of the sun. Yoriichi's strikes were so powerful and precise that they burned away demons' wounds at the cellular level, completely blocking their regeneration.
Crimson Blade: With the strength of his grip, Yoriichi could heat up his Nichirin Blade, causing it to turn a bright red color, draining even the Upper Moons of their strength.
Transparent World (透き通る世界): Born with this ability, Yoriichi could see the muscles, bones, internal organs, and bloodstream of living beings. This allowed him to instantly read enemy attacks and pinpoint their weak points.
Immunity to the Mark's Curse: All hunters who awakened the Mark died before age 25. Yoriichi is the only one to break this rule and lived to age 85 without losing a drop of his monstrous speed and strength.
A difficult childhood: Yoriichi was born a twin to a samurai family. Because of a strange mark on his forehead, his father believed him cursed and forced him to live in a small room as a servant, while his brother, Michikatsu, was raised as his heir. Yoriichi remained silent until the age of seven, leading to his being considered deaf, but one day he picked up a training sword and dispatched a powerful fencing instructor with four blows. After his mother's death, he left home, unwilling to take away his brother's status as heir.

Shin Kaminari is the very first Thunder Pillar (his original title in fanfiction is Rumble Hashira or Thunder Hashira). He belonged to the fictional Kaminari clan—skilled and incredibly fast swordsmen. Shin is credited with creating the Breath of Thunder.
Style Basis: He created the Thunder Breath by adapting Yoriichi Tsugikuni's Sun Breath. Fan articles claim his running and dashing speed was so great that he could break the sound barrier, and his sheer acceleration was almost equal to Yoriichi's own.
Weapon: Wields a standard Nichirin katana, which has yellow lightning patterns running along the blade.
Perfect Pitch: Like the canonical Zenitsu Agatsuma, Shin possesses phenomenal hearing, allowing him to fight blindly, detect echoes in caves, and even play any melody on the semisen flawlessly.
Slayer's Mark: Awakened a mark in the form of two lightning bolts on both cheeks, running from the ears to the eyes.
Face and Hair: A young man of short stature, fit and muscular. He has short yellow hair that fades to dark orange at the ends and jagged bangs. His hair is pulled back into a loose ponytail.
Clothing: Wears a traditional kimono (nagagi) ​​with a yellow-to-brown gradient, decorated with a pattern of white triangles (very similar to Zenitsu's haori). She wears white hakama pants and straw sandals.
Flirting and Charming: He is very attractive, confident and loves to flirt with girls, often buying them gifts or treats to melt their hearts.
Bright Side: Despite his reputation as a womanizer, he deeply respects women and possesses extensive medical knowledge. At the Hunter base, he often serves as the primary attendant for the wounded, earning him the respect of the other Pillars.
In battle: Transforms into a cold-blooded, insanely resilient and fearless fighter, capable of single-handedly destroying entire waves of demons.

Iwamoto Kazuyoshi is the first Stone Pillar of the Sengoku era.
Build: A huge, muscular man, standing approximately 200 cm tall and weighing over 120 kg. He has broad shoulders and scars from training and fighting demons.
Face and Hair: He has stern but kind features. His hair is dark and coarse, often pulled back into a messy bun or cut short to keep it out of the way in combat. He may have scars on his forehead or cheeks.
Clothing: He wears the standard Demon Slayer uniform of the era, over which he wears a heavy, traditional haori (often in dark, earthy, or gray tones). He often wears large Buddhist prayer beads around his neck or wrists, emphasizing his religious affiliation.
Nichirin Blade (Special Type): Instead of a classic katana, he uses a giant broadsword or a heavy axe (in some versions, a massive slashing weapon on a strong chain with a spiked ball, similar to Gyomei Himejima's weapon).
The foundation of his style: Maximum defense, devastating attacks, and exploitation of the environment. Kazuyoshi is as immobile as a mountain while defending, but his counterattacks are lightning-fast and devastating.
Special Technique: In combat, he uses the "Reptitive Action Technique" - through prayers and concentration on pain points, he brings his muscles and senses to an absolute peak, compensating for the lack of Breath of the Sun.
Origin: Born into a poor peasant family during the Sengoku era, he displayed anomalous strength from childhood, often considered "cursed" or feared.
Tragedy: His village or loved ones were destroyed by demons. Kazuyoshi survived thanks to his resilience, but was unable to save those he loved. This led him to take a vow to protect the weak and turn to faith.
Meeting Yoriichi: He met Yoriichi Tsugikuni and became one of the first Hunters. Unable to master the Breath of the Sun due to his heavy frame, he modified the technique to suit his needs, founding the Stone Pillar cult. Personality: Despite his tragic past and fearsome appearance, he is incredibly soft-hearted. He often cries, praying for the souls of those killed.

Yūsuke Mizuhara is a fan-made character (AU/Headcanon) created as the first Water Pillar in the Corps' history, who lived during the Sengoku era.
Pirate Past: According to the project's lore, Yusuke was born on Tsushima Island, far from mainland Japan. He lost his parents and was raised by a gang of pirates and smugglers, which gave him an excellent swimmer and incredible agility from childhood.
Personality: The authors gave him a cold, impassive face and an extremely pragmatic character ("a man by the book"). He deeply despises demons and has no patience for fighters who overestimate their strength and foolishly die on missions.
Training with Yoriichi: When the strongest swordsman Yoriichi Tsugikuni trained hunters, Yusuke was unable to master the Breath of the Sun due to his physical limitations.
Adaptation of the style: Yoriichi redesigned the technique specifically for him, emphasizing smooth, flowing, wave-like movements of the arms and weapons. Since his last name contained the kanji for "water" (水 mizu), the new style was named Breath of Water, and Yusuke himself became the first Hashira of this style.
Fifth Water Breathing Style: A fan wiki states that Yusuke showed mercy to demons who voluntarily surrendered and did not eat humans. He invented the Fifth Water Breathing Style (Dry Day's Merciful Rain), which grants a painless death through decapitation.
A lover of banquets: Yusuke attended the semi-annual meetings of the Pillars reluctantly and only enjoyed the grandiose festive feasts that were held after the official part.
Weapon and Mark: He fought with the dark blue Nichirin Sword, which he forged himself. Like the other Sengoku Pillars, he awakened the Demon Slayer Mark (in the form of a blue tattoo resembling a splash of water on his left cheek), which tragically led to his death at the age of 25.