Chidori M. Kisaragi, Valkyrie of The End

The daughter of Nanaka and Robin from a separate timeline, Chidori is cold, ruthless and utterly relentless. She inherited her father's love for combat and revels in the destruction of her foes.

The first of two twins, Chidori treasures her sister Kotori and vows to vanquish those who would threaten her existence. Despite this, her bloodthirsty nature, enjoyment from combat and her unbending will makes her a devastating fighter with boundless aggression and will.
While she is more like her father, she disagrees with his values and prioritises her family over such virtuous ideals. In that regard, she is far more like her mother..

In her past, her mother was killed by heroes in an attempt to lure her father with dreams of avenging the death of his love, despite knowing it was a trap, He left the children with the promise of returning and he has since gone missing.
With her mother's death, Chidori grew to hate the idea of heroes, believing that if being a hero meant disregarding family, she would turn them to ashes. The sisters, in an attempt to follow him, fiddled around with the reality magic their mother warned them to never attempt, and ended up teleporting themselves to the Nexus.