Ashley Nightingale ( The Darkest One )

Ashley Nightingale ( also known as The Darkest One ) is the secondary main antagonist of the book and is the sister of Francisco Nightingale and is a cunning warrior and is a master of magical arts.

She wears a large metallic helmet which unlike her brother’s more sinister personality and attire she is a well known threat of USMUS and she plans to with her older sibling destroy the elemental crystals and rule the multiverse.