Stella would take one of the many guest bedrooms. It wasn't very hard to decide. Afterwards, Luna invited everyone to dinner. It was only fitting to end the chaotic and unpleasant day with a great meal (that would, of course, be cooked by the royal cooks, not Luna herself.).
After the exotic feast of rotisserie phoenix (Celestia's bird was not happy) and mashed carrots, the Mane 6 left. Everyone prepared to tuck in for the night. Luna had been informed by Twilight sparkle about her mustache, which she vigorously scrubbed in the bathroom. Still, it only faded on her navy blue coat.
Cadance and Shining Armor had left before the dinner, as Flurry Heart had awoken from her nap and was heartily sobbing, according to Cadance's horn monitor. (Cadance had apparated there and back. Shining Armor had been in Canterlot for business, but Luna dismissed him early.)
Silver Sword went back to guarding, since he was on the night shift, and Celestia and Luna headed to ther bedrooms.
Luna stood on her balcony and raised the moon, then proceeded to practically faint with exhaustion on her bed.
Only one soul stirred that night. Stella couldn't sleep. She couldn't shake the feeling that something was going to happen. Even though she was tired, she was too afraid to close her eyes. Sometime around 1, she gave up and trotted to the library. There she stayed until she startled Luna, who came in in a bathrobe, humming and sipping triple-shot coffee.
Being a princess was exhausting.
Luna, though she knew Stella despised her, tried to make small talk with the refugee. "So, what's you plan? Like, how long are you staying?"
"Uh, forever. I assumed you would let me join the royal sisters, since I biologically am a royal sister. Unless you plan on kicking me out, so I can go back to being stuck in the stars by some dragon-bear-duck thing who you let run loose in this funhouse you call a country!" Stella replied indignantly. Luna backed off after that.
The two sat there in silence, the only sound being Luna sipping her coffee ffrom time to time. When the two saw the sun rise, they knew Celestia was up. Stella sighed.
"She never gave me a chance."
Luna head jerked towards the sudden sound, twisting her neck too far and nudging her coffee. She rubbed it and mopped up her spilled coffee with her horn (Not literally. She used magic from her horn.).
"What?"
"Celestia. I was born, not my fault, and she instantly despised me. When you were born, I was excited to move up a notch on the totem pole, but no. I was just generally disliked. Celestia raises the sun. You raise the moon. I... get left behind," Stella stammered. She sniffled. Luna wondered if she was crying.
"Look at my cutie mark! Yours and Celestia's are perfectly clear, but look at mine! What even is that?" Luna glanced at the crying pony's flank. It was three stars making a triangle. The one on the right bottom was a lighter pink and the left bottom was a royal blue, like the gorgeous color of a sunset, between light blue and dark blue. The top was the largest, though, and it was a sort of lavender, but a little pinker. These colors:
O O O
Luna looked for some sort of pattern between them. The colors seemed familiar to her, but she couldn't put on her hoof on just where. That was when the guards burst through the doors of the library.
"Madam Luna! ...Stella! We've been looking for you everywhere! Hurry!"