Since I've posted my MLP sona may as well show some OCs, I think I may make my sona live in their kingdom but idk.
These here are Princess Aurora and her loyal advisor, Mirage Nightseeker. Princess Aurora is a half-reindeer alicorn and Mirage is a unicorn ^^
The backstory basically is after Princess Luna was banished, Aurora was born with the ability to enter ponies' dreams. The downside to this is she doesn't have any dreams of her own, and also has aphantasia.
At first she simply dream twinned with ponies, but over time she learned how to control things. She earned her horn by saving somepony from a nightmare, and eventually became princess of the Aurora Borealis, creating Aurora Borealis instead of rainbows and leaving her job at the weather factory.
In Luna's absence, she took over dream busting and guiding ponies through their nightmares. After Luna's return, she was placed over her own kingdom (similar to Cadence reigning over the crystal empire) and that place has a permanent Aurora Borealis thanks to her. She continues dream busting in her own kingdom, leaving equestria's dreams to Luna, but making the job easier on her since it's spread out more now.
She recently got herself a royal advisor, an illusion specialist unicorn who helps her to visualize things and also impersonates her when necessary, among other tasks like organization of events and so forth. The two have become rather close over time.
Some fun facts are that Aurora is mostly nocturnal, like Luna, and Mirage's "wings" are actually just markings (it's hard to tell in the drawing. But she's just a unicorn!). Aurora, having been in the job for awhile, is a little more carefree and confident but Mirage is very organized and keeps her grounded.
I think Mirage would get along well with the changelings since she sometimes uses her illusion magic in a similar way. Although for her I imagine it'd take more energy and have more possible flaws than a changeling.
I actually created Mirage three years ago but I totally revamped her design! I'll have to add these gals to my art fight actually.