Two new characters will be added to the roster of Demon Slayer: The Hinokami Chronicles through an upcoming update. Demon Slayer: The Hinokami Chronicles will receive the free update will arrive sometime in late November to early December, which will add Yahaba and Susamaru into the game. More information on their inclusion and the update will arrive in the future. This includes potential gameplay information. [Thanks, ryokutya2089!]
Previously, the first free updateadded Akaza and Rui into Demon Slayer: The Hinokami Chronicles. These two free DLC characters were made available on November 4, 2021. One more set of characters that will be added into the game through upcoming free DLC. This does not include Yahaba and Susamaru.
Susamaru appeared in the Adventure Mode of Demon Slayer: The Hinokami Chronicles. However, through the free update, players will now be able to play this character through the Versus Mode. Similarly, Rui also appeared in the Adventure mode, and was later added as a playable character through free DLC. However, there is currently no hints as to who the final two playable characters will be.
Demon Slayer: The Hinokami Chronicles is now available for the PlayStation 4, PlayStation 5, Xbox One, Xbox Series X, and Windows PC.