Kiyoshi (清きよし Kiyoshi?) is the elder brother of Shoichi and Teruko, who gets kidnapped by the Drum House Demon, Kyogai.
Kiyoshi is a young man with black hair slightly longer than Shoichi's. He has hazel brown eyes just like his siblings and wears a persimmon colored haori over his green kimono.
Kiyoshi is a brave young boy who managed to survive on his own in a house with three Demons all trying to devour him. He is intelligent and crafty enough to use Kyogai's tsuzumi against him in order to survive. Tanjiro Kamado was impressed by Kiyoshi's will that allowed him to hold out for so long under these conditions.
Saburo (三さぶ郎ろう Saburō?) is a villager from the village near Tanjiro's home.
Saburo's hair is curbed. He has an oblong forehead and sharp brown eyes with no distinct pupils.
Saburo possesses sharp discernment. He also displays sincerity towards young Tanjiro, willing to offer him his own house to take rest in for a night because he believes man-eating Demons will come out during the night and it would be unsafe for travel.
As an ordinary human, Saburo does not posses any additional power or abilities.
Not much is known about Saburo's past except that his family was killed by man-eating Demons.