I just though of something... In Another World, Dario was supposedly killed by Karsh at the Isle of the Damned as he was possessed by the Masamune. In Home World, he appeared on an island but with a loss of memory. The Dario from Another World remembered briefly who Riddel and Karsh were, but then was re-possessed by the Masamune that suddenly appeared out of nowhere.
How is this possible? Did FATE have anything to do with this?