Lirex is new to Ponyville, he is a traveller.
The only reason he travels is to try to find out who he really is. When he is welcomed to Ponyville by Princess Celestia and her nephew, Prince Blueblood. He finds that Celestia must have some answers to him. The only thing he REALLY KNOWS about himself, is that he was abducted by Shadow-Bolts. His mother, from his research, is the infamous, Nightmare Moon.

However, can he prove to the Royal family that he belongs there, with the rest of the Royalty.

But he'll need some help of some old friends…