Elysia the Herrscher of Origin was a unique anomaly among the Honkai's destructive agents; she possessed the heart and ego of a human from birth, not the corrupted mind of the enemy. She used her power not to destroy humanity, but to lead the Thirteen Flame-Chasers against the Honkai, ultimately orchestrating her own public "betrayal" and death to change the universal rules and grant the next era's heroes the ability to retain their humanity and fight back.

After she sacrifice herself you got against Fate itself and saved her now both Are married and happy together.