Princess Luna yawned, wide awake, wandering the long, empty hallways of Canterlot Castle. There were still some hours before sunrise, and she had no intention of going to bed before then. She watched out the window at a small flock of nocturnal Pegasi, tasked with sprinkling the grounds with brushes of dew before the sun rose. She was indeed distracted with watching them when a small flash caught her attention, one which typically was the result of a flare of magic. The Night Pony frowned, picking up the scroll which had appeared, and gave its contents only a slight glance before bursting into a grin, and making a gallop for the eastern tower.
"Sister, sister!" Luna called.
Celestia grumbled, barely awake. "What is it, Luna? Are we under attack again?"
"No, though it's not like you'd wake me up even if we were," she said, a hint of irritation in her voice.
"Oh, Luna, you're still mad about that?"
Luna shook her head. "Never mind, darling. What is it?"
Luna smiled, and her magic lifted up the parchment which had arrived moments earlier. "A letter for you. Most mail is diverted to me during the night hours, but I thought you'd want to see this."
"A letter?" Celestia was awake instantly. "I haven't received a letter in years. Not a casual one, anyway." Her heart ached somewhat, she dearly loved correspondence, and the little ponies just didn't have time for her anymore. Not like they used to. Intrigued, however, she unrolled the parchment, and began to read.
Dear Princess Celestia,
It has been a busy day in Ponyville for us. New friends, old enemies, hostage situations, mutinies and forged alliances. A typical day for us, I suppose. The Changelings which you tasked us with watching turned out to be faithful to our cause after all. Chrysalis returned, though her current whereabouts are unknown. We opted not to defeat her, instead leaving her pride more wounded than anything. I don't think we'll be hearing from her again for a while.
Spike was kidnapped... dragonnapped? Is that a word? It's not in any of my 35 dictionaries, I'll have to make a note to write to the publishers about that... oh yes. We would have all been flattened straighter like Pinkamena's mane if the Changelings hadn't come when they did, and we've decided to let them stay in Ponyville. We've all taken one, except for myself and Fluttershy. I'm very busy with my studies, and Fluttershy is too busy with her animals. But all things considered, it's been a successful day.
I think we've all learned an important lesson here today. The Changelings may look scary, and may even appear untrustworthy, but they really pulled through today. Everypony is deserving of a second chance. If somepony really wants to change, they will, they just might need a little love and encouragement.
Always Faithful,
Twilight Sparkle
AND SPIKE (although this was written in a sprawling cursive)
Celestia smiled, and looked across at Luna, who had already summoned a small black book in front of her.
"Make note of this, Luna. I think she's just about ready."
"We are in agreement, then, dear sister. Let the final tests begin."
"But once the sun comes up, perhaps?" Celestia asked.
"Of course." Luna replied. "For tomorrow is a new day."