In Demon Slayer, Giyu Tomioka is among the principal supporting characters in Kimetsu no Yaiba. He is a Demon Hunter from the Demon Hunter Corps and the current Water Pillar.
APPEARANCE Giyu Tomioka

Giyu is a young man with a strong body. He sports an edgy skin, often seen with a serious expression on his face. His hair is dark with irregularly shaped outlines that appear like tufts on his head. He wears it in a ponytail that is tied to his small head and his hair falls over his eyes in an unnatural way.
Giyu’s eyes are clean and medium-sized, extended with a light blue iris and dark blue pupils that are accented by his thin eyebrows. Giyu wears a distinct version of the traditional demon hunter uniform which has dark cyan hues and white bandages that run around his legs. He also wears Zori shoes that have white soles and dark blue straps.
He is wearing dark blue socks with his shoes. Giyu wears a haori split into two distinct parts; the right side is shaded a solid red while the left is printed in tiny orange, green, and yellow squares. The pattern on the left side belongs to his sister Tsutako and his most beloved friend Sabito. In the last battle against Muzan Kibutsuji, he loses his right hand and following the battle, he cut his hair, making it shorter and lacking his adorable ponytail.
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PERSONALITY Giyu Tomioka

Giyu is one of those who has an empathetic expression on his face. He’s an introverted person who is adamant about justice. He does not accept those who disregard their own boundaries and abandon their lives. After he saved Nezuko Kamado’s life due to Tanjiro Kamado’s steadfast determination.
Giyu shows no excitement in removing demons and displays little respect for them like most exterminators do. After rescuing Nezuko along with Tanjiro from Rui’s Lower Moon kekkijutsu, he has violated the conduct of the Corps by shielding Tanjiro’s sister from being slain by the force from Shinobu Kocho, the Insect Pillar, who was poised to take her life.
This action suggests that Giyu doesn’t have an absolute hatred of demons and is willing to make an exception for those who aren’t able to kill or consume people, and permitting them to live alongside humans. It also shows that he has a pragmatic approach to demons in contrast to the usual approach that many Pillars treat them through the lens of hate. Giyu is said to have insecurities about how and what coworkers are thinking about him.
This shows that he’s perplexed when Giyu hears Shinobu Kocho claim that he’s a target of some, however it’s evident that he’s not frightened by the snarkiness from the Insect Pillar and starts to dismiss her insinuations despite the fact these pillars have been buddies for many years and have a long-standing history in common. Giyu is a man with little words and has difficulty communicating with his colleagues which is why he constantly distances himself from his colleagues.
It later becomes clear that Giyu has an insecurity that tells him that he is not worthy of the highest rank of his Corps in addition to believing that he didn’t deserve to be the Water Pillar. This mental illness was triggered by his participation in the final round of selection where he couldn’t fight a demon, and would have been killed if not because of Sabito’s sacrifice, his most trusted friend Sabito. This issue became so serious that he decided to resign his role as the Pillar of Water until Tanjiro Kamado helps Giyu to not act out of guilt over having made it through the final selection, and show respect to the people who gave their lives in his honor. This guilt of a survivor is brought up when he is convinced that Tanjiro was killed in the fight against Muzan.
Despite his tough exterior, Giyu has proved himself to be a kind and compassionate person to the people whom he most loves. He has taken on his cheerful personality when he smiled at his fellow Kamado siblings and developing an enthralling friendship with Sanemi Shinazugawa. The once-combative relationship has gradually transformed into an understanding between both.
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Abilities Giyu Tomioka

General Abilities: As a Pillar of the Demon Slayer Corps, Giyu is a skilled and formidable swordsman. He has been successful in killing the Spider Demon Father in his transformation and Lower Moon Rui. During his fight with Akaza, he was able to stop him. At some point during the fight, Upper Moon was amazed at his opponent’s skills and even offered to make Pillar become a monster. Giyu does not want to.
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PHYSICAL ABILITIES

Increased Strength: Pillar Giyu has increased his physical power to an almost superhuman level, performing amazing feats, such as holding Nezuko in her demon-like form using just one of his hands, without exerting any effort, and then knocking her unconscious in just one strike. In his gaiden volume, he was able to break strong ropes around his wrists when he was arrested for being a criminal.
Incredible Speed and Rapid Reflexes: Giyu moves with incredible speed after he was able to tie Inosuke with a branch, without the tree’s owner realizing and was capable of cutting Rui’s head off within one glance. After awakening his hunter’s mark, Giyu was able to speed up to the point that Akaza was unable to keep his pace.
An abundance of Stamina and Endurance: Despite having gained these skills through an intense training regimen, Giyu reached a high stamina and endurance that was displayed during battle, as when he faced Muzan during his Countdown to Dawn arc where the battle lasted only one hour fighting Muzan the Demon King.
MENTAL ABILITIES

Tactical Mind: Being a skilled Demon Slayer, Giyu Tomioka possesses an amazing tactical mind and is able to master any form of fencing and keep pace with two demons of the highest level simultaneously.
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SUPERNATURAL ABILITIES
The Hunter’s Mark: Giyu’s hunter’s mark resembles a flow of water flowing down the left cheek. It has an appearance that evokes the breath that has been absorbed by this Pillar. If this mark becomes active, Giyu is able to experience a huge increase in speed, the accuracy of his punches, as well as the strength of his fight, becoming in a position to endure a lengthy battle against Akaza.
The Red Nichirin Blades: The sword’s color allows its owner to stop the quick regeneration mechanism that is used by demons.
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VARIOUS ABILITIES
In his fights Giyu has displayed a ferocious determination and resolve, and has never stopped fighting and defeating the strongest opponents like Akaza as well as Muzan.
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COMBAT STYLE:

Master Swordsman: As a Pillar, Giyu is among the most skilled and powerful swordsmen of the entire organization, and is a formidable foe during battle. The Upper Moon Akaza said that the Water Pillar has the most well-developed fencing.
The Water Breath (Mizu No Kokyu): It is among the five major breaths that are derived directly from the Sun Breath. The breath has 11 forms, with the 11th one being made through the Water Pillar itself.
1) First Form: Water Surface Slash (Ichi no Kata: Minamo Giri)
2) Second Form: Water Wheel (Ni no Kata: Mizu Guruma)
3) Third Form: Fluid Dance (San no Kata: Ryuryu Mai)
4) Fourth Form: Striking Tide (Shi no Kata: Uchishio)
5.) Fifth Form: The Blessed Rain Following Drought (Go no Kata: Kanten no Jiu)
6) Sixth Form: Whirlpool (Roku no Kata: Nejire Uzu)
7.) Seventh Form: Piercing Rain Drop (Shichi no Kata: Shizuku Hamon Tsuki)
8.) Eighth Form: Waterfall Basin (Hachi no Kata: Takitsubo)
9) Ninth Form: Splashing Water Flow (Ku no Kata: Suiryu Shibuki)
10) Tenth Form: Constant Flux (Ju no Kata: Seisei Ruten)
11) Eleventh Form: Dead Calm (Ju Ichi no Kata: Nagi)
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Equipment Giyu Tomioka

Nichirin Blade: A sword made from a unique ore that is continuously exposed to sunlight. These blades are able to alter their color in accordance with their owner. Each color comes with its own unique qualities. Giyu’s katana features the dark color of its blade, with a blue border which is in reference to the water breath that is used by the Pillar. The apex of the blade is adorned with an inscription reading: Akki Messatsu (destroyer of demons).
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