Protagonist of the story, as well as a freshman in high school. Has lived at the Asahi Orphanage for 15 years ever since he was abandoned there as a newborn child. Occasionally, when he touches someone, he is able to read that person's emotions. Though he suffered extremely as a result, he has grown into an unyielding individual. Despite not having any memory of his previous existence, Yuki feels an odd nostalgia for Luka and ends up confiding in him. Since leaving the orphanage to go with Takashiro, Yuki has been referred to as "Gioh Yuki".
Yuki was a princess of the Giou clan and the previous incarnation of Sakurai Yuki. She had the power known as the "Light of God", which consists in healing wounds made by demons and taking the pain of the people she is healing to herself.