Princess Luna is the ruler of the night, and co-regent with her sister Princess Celestia. She is also the worst dieter in existence, managing to accumulate pounds around her plot that practically give her her own gravity. At least partially to blame for Equestria's disarray when our story opens, she's at least as much a lover of cake and loather of legislation as her sister. Though she does make the occasional attempt to help govern, most of her proposals are either impossible or illegal. Or both. A watcher of dreams and invader of privacy, she has a soft spot for a certain changeling who appreciates her assets.