The character sheet of Princess Luna on my AI Dungeon space opera fanfic, 3343: Spaceship Runners
She served as regent to her older sister, Princess Celestia AKA Empress Starluna in the Regency Council within an interstellar feudal empire, the Integrated Regency of Bhaattirnia, which she governed as Empress.

Lore from the story card:
“Princess Luna, the younger sister of Princess Celestia, is an alicorn mare who serves as a key leader of The Regency Council in the Integrated Regency of Bhaattirnia, utilizing her exceptional magical abilities and diplomatic skills to maintain harmony among the council’s noble representatives, while navigating the intricate web of alliances and rivalries within the Virgo Supercluster, driven by a desire to protect the regency’s interests and promote cooperation among its member worlds, and often seeking to balance her own ambitions with the wise counsel of her sister, Princess Celestia, in the governance of the regency and the broader geopolitics of the supercluster.”