Tanith

In a space between universes, an obsidian-scaled dragon the size of a few planets combined was sleeping. This was one of the most powerful dragons second only to the mother of all dragons. This was another companion of an incarnation of the Strongest, Tanith. 

She was dreaming her never-ending dream of the days she adventures with Edge Regius and Rei Kuraki. Those days of fighting alongside her companions were the best of times. Back then Tanith thought those days would continue forever, but after Rei's death, their contract could no longer be felt. 

She could not understand it at the time, as the Strongest Mortal Soul wasn't he bound to reincarnate endlessly, so surely he must exist somewhere. In the beginning, Tanith alongside Tsukiyomi traveled through different universes trying to find the reincarnated Edge, but no matter how hard they tried they could not find him, eventually, Tsukiyomi stopped her journey with Tanith.