Rengoku and Tengen

Like his personality, Kyojuro Rengoku's physical appearance is vibrant and directly evokes fire. His design is one of the most iconic in the series due to its intensity.
Height and Build: He is a man of medium-tall height (1.77 meters) with an athletic and robust build. He conveys an imposing and energetic presence.
"Flaming" Hair: Her most distinctive feature is her long, glossy, golden-yellow hair with red streaks at the tips that resemble flames. She has a forked fringe and two long strands that frame her face.
Intense Eyes: Her eyes are large, yellow with red irises, and always seem wide open, giving her an expression of constant enthusiasm or surprise. Her eyebrows are black and very thick, accentuating her determined gaze.
Attire and Cloak: He wears the standard dark uniform of the Demon Slayers, but what truly stands out is his haori (cloak). It is white with a gradient of red and yellow flame patterns along the lower edges, mimicking real fire.
Footwear: She wears black tabi socks and traditional footwear, with leg wraps that also follow the pattern of red flames on a yellow background.
Unlike Uzui, who uses jewelry and makeup, Rengoku's design is more traditional and uniform, focused entirely on the aesthetic of the fire he represents.

Uzui, the Sound Pillar in Demon Slayer, is an extremely eccentric, egocentric, and flamboyant character who proclaims himself the "God of Extravagance." Although he appears arrogant and insensitive at first, he is a deeply caring and protective leader to his three wives and subordinates, prioritizing their lives above all else. Extravagance and Arrogance: He always seeks attention, valuing anything "flashy" or "shiny." He considers himself superior, often behaving inconsiderately toward others and treating them harshly. Caring and Loyal: Despite his tough exterior, he deeply cares for his wives (Makio, Suma, and Hinatsuru). After the Entertainment District arc, he becomes more friendly and protective of Tanjiro, Zenitsu, and Inosuke.
Reverse Shinobi Philosophy: As a former shinobi, he rejects the idea that the mission is more important than life, teaching his subordinates that they must value their own lives first, then the lives of the innocent, and finally their own. Extreme Confidence: He possesses great confidence in his fighting abilities, allowing him to remain calm and resourceful in high-pressure situations.
Tengen is a mixture of flamboyant arrogance and a deep sense of responsibility and love for his loved ones, demonstrating strong personal growth and a hidden compassion beneath a superficial form.
Physical Appearance: Tengen Uzui is one of the characters with the most striking and detailed design in Demon Slayer: Kimetsu no Yaiba. Physically, he is characterized as an imposing and extremely attractive man. Appearance, Build, and Height: He is the second tallest Hashira, standing at 1.98 meters (6'6"). His body is extremely muscular, with broad shoulders and an athletic build that reflects his training as a shinobi and demon slayer. His skin has a slightly tanned tone. Face and Hair: He has pure white hair, which he usually wears tied back with a white wrap, letting a few strands fall loose.