User blog comment:Imouto-tan/Deyanira/@comment-4867780-20161207205524/@comment-26362471-20161212224949

Deyanira symbolizes various ways to die and aspects of the Apocalypse, but, she is indeed tied to the Apocalypse Effect and will die if it was ever destroyed.

Deyanira is an alternate Universe's Sherria Amicus so it would stand to reason that she's extremely powerful.