Kyojuro Rengoku

Kyojuro Rengoku (煉れん獄ごく 杏きょう寿じゅ郎ろう|Rengoku Kyōjurō) was a supporting character in the manga series Demon Slayer: Kimetsu no Yaiba, as well as its anime adaption.

Rengoku was a Demon Slayer and the Flame Pillar of the Demon Slayer Corps, standing amongst the mighty Hashira. He would eventually die at the hands of the Demon Akaza.

He is voiced by Hino Satoshi in the Japanese version of the anime.

Appearance
Kyojuro was a young man with bright yellow hair with red streaks, black forked eyebrows, and golden eyes. He was fairly tall by Japanese standards and possessed a relatively muscular build.

His outfit consisted of the regular Demon Slayer uniform along with a white-yellow gradient pattern and red flame-like ridges at the end.

Personality
Kyojuro was greatly enthusiastic in regard to his duties as a Pillar and often cheerfully eccentric. He was amiable, kind and boasted extraordinary technique and swordsmanship stemming from strict practice and discipline. He was an honorable warrior who adhered to his code of morals and principles that was instilled into him by his mother at a young age - the most significant being that those who were born strong have a duty to protect the weak.

Abilities
Breath of Flames Style (炎ほのおの呼こ吸きゅう Honō no kokyū): This technique allowed Rengoku to increase the amount of oxygen in his blood by controlling his breathing pattern, which increased his strength and agility to equal that of a Demon. Kyojuro had learned to do full focus breaths at all times, further increasing his base strength, speed and stamina. By focusing his breathing on specific points, he was capable of stopping bleeding from injuries. There are at least a total of nine styles that can be used with the Breath of Flames, although Rengoku only displayed five of these.
 * First Style: Sea of Fire (壱いちノ型かた 不知火しらぬい Ichi no kata: Shiranui): Kyojuro would charge towards his opponent at high speed and decapitate them in one or multiple slashes. This technique had enough force to launch train carriages off their tracks.
 * Second Style: Ascending Blazing Sky (弐にノ型かた 昇のぼり炎えん天てん Ni no kata: Nobori en ten): An ascending slash. Kyojuro used this technique to slice Akaza's arm in half.
 * Fourth Style: Wave of Blazing Flames (肆しノ型かた 盛せい炎えんのうねり Shi no kata: Sei en no uneri): Kyojuro span his sword in a circular motion, deflecting his enemies attacks.
 * Fifth Style: Flame Tiger (伍ごノ型かた 炎えん虎こ Go no kata: Enko): A series of sword slashes that took on the form of a tiger. Kyojuro used this technique to contest Akaza's War Style.
 * Ninth Style: Purgatory (玖くノ型かた 煉れん獄ごく Ku no kata: Rengoku) - A devastating dashing slash that Kyojuro initiated from a high stance, the technique had enough power to carve a deep impression in the ground where he used it. Before using this technique he remarked to himself about "thoroughly hollowing out most of the area".

Trivia

 * Kyojuro was ranked in 7th place as of the first character popularity poll with 1,021 votes.
 * Kyojuro loved to watch sumo wrestling.
 * Kyojuro's favorite food was sweet potatoes and his favorite side dish was salt grilled bream.
 * Kyojuro's birthday was May 10th and he was 20 years old at the time of his death.
 * At the time of his death Kyojuro weighed 72 Kg and was 177 centimeters (5'9½") tall.