Yuki Hideyasu, also known by his alias Sōki (蒼鬼, lit. "Pale Blue Demon"), is a character from the Onimusha series. He first appeared in Onimusha: Dawn of Dreams as the new protagonist, replacing Samanosuke, Jubei Yagyu and Jacques. He is roughly based on the historical figure, Hideyasu Yūki.