Returned Ones seem to vary based on the means of revival and the being that revives them as seen comparing Lady Gakusho (Created by the Red Dragon) and Mashiro (Created by Inori). Inori's power as a Koutoushu is creating Returned Ones. Returned Ones were previously legendary beasts of mythology, that were said to have once laid waste to Nil Kamui. According to legend, those who held large reserves of energy within, or those who had the makings of heroes, would return from the dead in the form of beasts.