Kyojuro Rengoku

Kyoujurou Rengoku was a Demon Hunter and the Flame Pillar of the Demon Killing Corps.

Appearance
Kyoujurou was a young adult of tall stature with bright yellow hair with red streaks, black forked eyebrows, and golden eyes.

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

Personality
Kyoujurou 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.

History
Kyoujurou is the eldest son of Shinjurou. His father was known as the Flame Pillar of the Demon Killing Corps until his unexpected retirement.

During the Demon Train Arc, it is revealed that Kyoujurou has a younger brother who trained alongside him until their father ceased to teach them. His strength is displayed when he defends over 200 people from being slaughtered by the demons. He comes face to face with the Third Upper Moon, Akaza, and battles him head on but is fatally wounded and succumbs to his injuries.

Natagumo Mountain Arc
Kyoujurou was present with his fellow Pillars when Kamado Tanjirou awoke.

Functional Recovery Training Arc
Kochou Shinobu noted that Tanjirou was on trial, which Kyoujurou saw no need for, as the youth's protecting of a Demon was a clear violation of conduct, a matter he stated they could deal with themselves. He then agreed with Himejima Gyoumei's idea to kill Kamado Nezuko, witnessing shortly afterward Tanjirou's coughing fit, and remained silent when Kanroji Mitsuri asked if they should be dealing with their subordinate's trial without Oyakata-sama's input. After Tanjirou headbutted Shinazugawa Sanemi, Kyoujurou looked at Mitsuri when she laughed with a neutral expression.

Natural abilities
Enhanced strength: Kyoujurou possessed great hand and arm strength that was described as "Unbelievable" by Akaza despite the fact he was gravely injured during that time.

Enhanced speed: Kyoujurou could move at high speeds that even a trained Demon Hunter like Tanjirou couldn't see or follow and could even cause tremors with it.

Swordsmanship
Breath of Flames (の)
 * 1) First Style: Sea of Fire (ノ) - Kyoujurou charges towards an enemy at high speed and either decapitates them in one shot or multiple slashes.
 * 2) Second Style: Ascending Blazing Sky (ノ り) - A single upward slash.
 * 3) Third Style:
 * 4) Fourth Style: Wave of Blazing Flames (ノ のうねり) - Kyoujurou uses this technique to defend from oncoming attacks from enemies.
 * 5) Fifth Style: Flame Tiger (ノ) - Kyoujurou creates a short range flame attack in the shape of a tiger.
 * 6) Sixth Style:
 * 7) Seventh Style:
 * 8) Eighth Style:
 * 9) Esoterica: Ninth Style: Purgatory (ノ) - A powerful long-distance attack Kyoujurou uses to charge at the enemy with great force and strength as it can leave a deep depression on solid ground when combined with Full Focus Breaths.