Kyōjurō Rengoku

Kyojuro was a young adult of tall stature and muscular-athletic build. He had long bright yellow hair with red streaks akin to flames along with two shoulder-length bangs and two chin-length bangs on the side of his head, black forked eyebrows, and golden eyes that fade to red with white pupils. He was known to be charismatic and had an air of great optimism, having an enthusiastic smile plastered on his face nearly all the time.

Kyojuro wore a paler brown version of the regular Demon Slayer uniform, which consisted of a brown gakuran jacket, a white belt around his waist and tattsuke-hakama pants. Over this, he wore a haori with a white-yellow gradient pattern and red flame-like ridges at the end that his father Shinjuro had once worn and more than likely his father had worn when they were the Flame Hashira respectively. Finally, he wore red kyahan with yellow flames erupting from the bottom-up, with pale brown tabi socks and a pair of white zōri with red straps.

When he first joined the Demon Slayer Corps, he only wore the regular Demon Slayer uniform but as he rose up the ranks, Kyojuro started wearing a completely white haori before donning on his signature flame-patterned one.

Overall Abilities: As a Hashira of the Demon Slayer Corps, Kyojuro was a very powerful and skilled combatant.[2] Before he took his father's place, Kyojuro was already shown to be an amazing fighter. He successfully avenged the death of the 9 Demon Slayers that died to the Flute Demon by himself and later managed to singlehandedly defeat Lower Rank Two, Hairo, who even appraised his swordsmanship before he died. Moreover, his father, Shinjuro Rengoku, stated that, after he stopped teaching his son, Kyojuro trained himself to become a Hashira by learning from the guide book of the Flame Breathing style, a book which only had three volumes.[3]

Akaza and Kyojuro exchanging blows at blinding speeds Kyojuro fighting on equal ground with Upper Rank Three, Akaza.

As another testament to his abilities, Akaza, the Upper Rank Three and one of strongest of the known demons, acknowledged and praised Kyojuro's strength.[4] He even went as far as to offer to turn him into a demon so he could surpass his human limits and become stronger, something he only offered to swordsmen whose abilities he believed were refined to their utmost.[5] Akaza also complimented his fighting spirit and stated that it was getting close to the "Realm of the Highest," which implied that he was incredibly close to obtaining the Transparent World (透すき通とおる世せ界かい Sukitōru Sekai?) and the Selfless State (無む我がの境きょう地ち Muga no Kyōchi?).

Extrasensory Perception: Kyojuro had incredibly honed senses, such as when he was able to sense and perceive Akaza's immense presence and demon aura.[6] Kyojuro was also capable of sensing demonic presences faster and more accurately than Tanjiro Kamado, who harbors an acute sense of smell, when he detected two demons right after another on a train before anyone else noticed.[7] This ability also allowed him to precisely gauge the regenerative abilities and weaknesses of most demons, like Enmu.[8] Kyojuro was also able to perceive Tanjiro's injuries and torn blood vessel accurately, which allowed him to teach him how to plug up that wound and prevent him from dying of blood loss.[8] Furthermore, he was able to detect malice in Enmu's spells and prevented himself from getting incapacitated