The Queen of the Abyss and lord of the dark forces. After watching the new home she came to love be destroyed by celestia and witnessing all their corruptions lumine made a vow. She would bring down their corruption even if she had to use dark powers and change her own body to do so. She has even managed to convince her brother to join her as her fellow Queen of the abyss. Now the twins seek to conquer the world and save it from celestia even if they must use dark powers to do so.
So yeah I decided to do a dark side story end of the twins became abyss conquerors. Not necessarily evil just seek to rule by force for the sake of eliminating the evil of celestia.