Edmund was the guardian of Onyx Island in the year 3437 P.X.E.. He had a working relationship with Silver the Hedgehog and had been allowing him to use his island for research in order to find the "traitor" among the legendary Knothole Freedom Fighters and save their future from destruction. Edmund acted as a mentor to Silver, teaching him how to outwit opponents and about the properties of Chaos energy. He also owned a library chronicling the history of Mobius and the Freedom Fighters. Despite his age, he could come to Silver's aid such as when the latter was attacked by an unknown assailant and helped subdue it with his Chaos powers. Usually, however, he acted only as a mentor to the young Hedgehog.