Es is one of the newer characters of BlazBlue. Her Drive, Crest ArtsGuardMidStartup25 [23]Recovery29Advantage0, creates "after images" after certain attacks. Crests activates after a period of time, like a delayed bomb, and can be used in combos, mixups, and okizeme. All of Es's Drive normals have Crest effects, while Es's specials only have Crest effects with the Bors buff.
In the story, Es is the the main heroine of XBlaze. At an unspecified point after the events of XBlaze, Es has somehow become the guardian for a mysterious gate that leads to the "realm of the gods." She makes a cameo appearance in several characters' endings in Act 2 and Act 3. She is fated to encounter Ragna the Bloodedge, as the Azure has deemed him the one worthy of "opening the gate". She made her debut as a playable DLC character in the console version of BlazBlue Central Fiction. In BlazBlue Cross Tag Battle, she is the final opponent before the gate of all worlds.