Obviously you have Trixie, Pickles and their little Stardust on the bottom as she plays around with her magic for the first time, deciding to do a little makeover on his mane XD
Then on top is another character is actually important to their story. She based off of a custom pony I had made by another artist, and her name is Quasar. I ended up putting a background to her as a different type of pony called “Celestial Pegasus” who are basically in charge of making new stars, relocating other ones (which is called Star Bucking. Wish on a shooting star anyone?) and the processing of old, dying stars.
Trixie and Pickles meet Quasar when the star she’s working on, which turns out to be THEIR star, comes crashing down to Equestria, nearly smashing into them. Legend has it in Equestria, that when two hearts come together, their love is strong enough to send energy to the cosmos, and form a new star in the sky