Kaijin no Sōki is the protagonist of Onimusha: Dawn of Dreams, the fourth primary entry in Capcom's Onimusha series that fights by using the power of the Oni. He is also known by other names such as Hideyasu Yuki, Black Oni, and Oni of the Ash, the latter of which he was christened by the townsfolk due to his resemblance to the Oni God. With Lamentation, the broadsword given to him by his mother, he sets out on a journey to burn the Genma trees and defeat the Genma running rampant across the land. Sōki's primary goal is to stop Hideyoshi Toyotomi from resurrecting the Genma Lord Fortinbras.
Tatsunoko vs. Capcom
Sōki is one of the playable fighters in Capcom's crossover fighting games Tatsunoko vs. Capcom: Cross Generation of Heroes and Ultimate All-Stars. He is also currently the only figure from the Onimusha series that appears in a playable form in any of Capcom's crossover fighters.