Kiriya Ubuyashiki (産うぶ屋や敷しき 輝き利り哉や Ubuyashiki Kiriya?) is the only son and middle child of Kagaya Ubuyashiki and the head of the Ubuyashiki Household. After his father's passing he leads the Demon Slayer Corps as the 98th and final leader.
Kiriya has light, pale skin and large eyes. He has the same hairstyle as the rest of his siblings; a blunt bob with a fringe covering his eyebrows, colored black. As he was raised as a girl, he takes on a more feminine appearance during his first appearance.
During the Final Selection test, Kiriya wears a purple kimono with patterned flowers and a green obi. His head is adorned with a wisteria headpiece.
Later on in the manga, after he becomes the leader of the Demon Slayer Corps, he wears a black kimono with a long white kimono jacket that's reminiscent of his father.
Zenitsu Agatsuma (我あが妻つま 善ぜん逸いつ Agatsuma Zen'itsu?) is one of the main protagonists of Demon Slayer: Kimetsu no Yaiba and a traveling companion of Tanjiro Kamado. He is also a Demon Slayer in the Demon Slayer Corps.
Zenitsu is a young man with fair skin and downward-sloped, scared-looking eyes that fade from soft brown to gold. He has short, yellow hair of varying lengths, cutting off squarely at the ends where it fades to a darker orange color, that falls in front of his face in uneven bangs. Before he became a Demon Slayer, Zenitsu's hair was originally black, but it turned the color it is currently when he was struck by lightning during his training.
For some time following the battle at Natagumo Mountain, his limbs temporarily shrunk due to Demonic poison but were able to return to normal afterward thanks to the medicine given to him by Shinobu Kocho.
He wears a paler brown version of the standard Demon Slayer uniform, which consists of a dark brown gakuran jacket, a white belt around his waist and hakama pants that extend, as well as his signature white-triangle patterned, yellow and orange gradient haori. As well as this, Zenitsu also sports a pair of tabi socks, tied at the front in 3 white bows, with the same pattern as his haori, and white-laced footwear.