Sakonji Urokodaki (鱗うろこ滝だき 左さ近こん次じ Urokodaki Sakonji?) is a retired member of the Demon Slayer Corps, having held the position of the previous Water Hashira (水みず柱ばしら Mizu Bashira?). He is the main cultivator of the Water Breathing, having trained Giyu Tomioka, Tanjiro Kamado, Sabito and Makomo.
Sakonji's face has never once been revealed or depicted throughout the entire completed manga; he is always seen wearing a tengu mask that covers his entire face although Tanjiro states through a Taisho secret that Sakonji's face is very gentle and calm. He appears to be an elderly individual, as noted by the countless number of students he's trained, along with his silver-colored hair. In his youth, his hair was black and fashioned into a topknot.
He is always seen wearing a cloud-patterned jinbei kimono with navy colored pants which are fastened at his shins by white kyahan guards. He also wears traditional black tabi socks, and sandals similar to Tanjiro, except his sandals have blue straps. On the occasions when Sakonji travels, he wears a white cloth that covers his head and wraps around his neck.
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.