Dear Princess Celestia and Luna,
Sorry for bringing this up when you have recently retired, but I could use your help. Twilight was not here this morning, and when I talked to my friends, they said that they haven't seen her since her last visit to them (a few days ago). She left no note and did not take anything with her, including the amulet. I am sure I hope that she is fine, but if she does not return before dusk, both of you may need to control the Sun and Moon again. I will send an update on her whereabouts once I get the chance, but with Twilight missing, I have to take over her duties. Right now, all I know is that she was here this morning (the Sun's up), but I have not seen her since last night.
With friendship,
The Royal Advisor, Spike.
After sending the letter, Spike began to work on Twilight's tasks, he was glad that she always had a list or a schedule prepared for the next day. He grabbed the notes on her desk in their room, which had once belonged to Celestia and Luna, and began to read through her tasks.
Throughout the day, Spike was trying his best to complete Twilight’s duties, but he had to call on Starlight for the meeting about the School of Magic and was unable to do the things only an alicorn or skilled unicorn could do. He hid it well, but he was very concerned about Twilight. She usually left a note or told him in advance. His first thought was that she was ponynapped, but he tried to dismiss it as an urgent summon, perhaps by the Cutie Map, or maybe some creature in need of help.
Dear Spike,
We are happy to assist in raising the Sun and Moon today, and we hope that you are doing well in Twilight's absence. We know that you have never been the best at politics, but we have no doubt that you will do your best, even without Twilight. Please notify us of any information you receive on her location we are very concerned that she has not been able to send a note. If things become more serious, we will be happy to come back to Canterlot to help. We know that the magic from us and the amulet is still working since the sun has been moving across the sky, but as you know, sunrise and moonrise are the times when pony magic is required.
Best Wishes,
Celestia and Luna.
Spike sat down in one of the chairs in the dining room, normally he shared his time with Twilight, or with one of their friends if time allowed, but now he was all alone in the large room.
. . .
After performing several more duties, Spike sent another letter to the sisters.
Dear Celestia and Luna,
Twilight has not returned yet, so I'd like it if you could please take care of the Sun and Moon for today and probably tomorrow morning. I'll let you know if she returns tomorrow.
Spike knew his letter had reached them because, in a few moments, the Sun began to set, and the Moon to rise. He was relieved that at least one problem had been solved today.
. . .
The next day, Spike woke up and checked around the castle, mainly Twilight's room and the throne room, but there was no sign of her. Beginning to worry, Spike sent letters to his friends, and Celestia and Luna.
Dear Starlight, Rarity, Applejack, Rainbow, Fluttershy, and Pinkie,
I still have not seen Twilight, and I've started to worry. What if she was ponynapped?! I wanted to let you all know that I've got most things covered here in Canterlot, but I would appreciate it if you informed the citizens of Ponyville about her disappearance. However, please do not cause worry - I did that in Canterlot, and things did not end well! Anyway, I'll be sure to let you know if she returns as soon as possible, but until then, try not to freak out!
See you soon,
Spike.
The letter to the sisters was similar, but he asked them to continue raising the Sun and Moon like they had done last night, and this morning. However, Spike was not expecting them to show up in person, instead of delivering another letter.
"Hello Spike, it's good to see you again, though I wish it were on better circumstances." Celestia and Luna appeared before Spike, both smiling but unable to hide their worry.
"We trust that you have been doing a good job as a leader, but we thought that you might need a little help, and things have become a little dull in Silver Shoals—it's been, what, two Moons since the attack of Crysalis, Tirek, and Cozy?" Luna was correct, it seems like every two months there's another major threat to Equestria, so it's not all surprising that the sisters may be called upon for their magic now and then. Twilight has only begun her rule, but everypony knew that she was still not quite as powerful as Celestia and Luna without her friends (although with her friends she was just as, or even more powerful than them).
"Thank you for coming all this way to help, I'm sorry that you had to come back so soon," Spike said, realizing that Twilight would not like that she inadvertently caused the sisters to have to work again.
"Oh, it's no problem at all!" Celestia said, "we were planning on checking in on how you, Twilights, and your friends are running things here." Spike was glad that they were not upset, but he was still surprised that they had come so readily.
"We’ll be able to help take care of some of Twilight's duties that require magic. You said recently that there was a problem with the volcano in the Dragonlands that Twilight was meant to take care of." Luna said.
Although everything was now under control, the group was worried about Twilight. Where had she gone? When will she be back? Should we start searching? None of them voiced these worries, but each of them had a feeling of dread in their stomachs.