Otherwise named Princess Eliana, Empress Eclipse is the demonic offspring of Nightmare Moon and Daybreaker, or copies of them. Despite her parents being incredibly evil and dangerous, Eliana is actually very sweet and kind when she is not in battle. Despite her outward appearance she doesn’t particularly like being wicked, she just feels like she has no other choice due to how her subjects view her with the same fear as her mothers.
 
She comes from an alternative timeline, where her mothers rule side by side as Equestria’s dictators, creating an eternal eclipse.