A pony's parents play a role in what they will become or believe, depending how they're raised, feed, and respected. However, there are some cases where a foal will be whatever they are born and nothing more. But that doesn't have to
When Jack Pot, that is, Trixie's father, tells the story of Nightmare Moon, Trixie wants nothing more than going to the moon to make company for the mare on the moon.
It has been several days since Trixie went to the moon to keep company to Nightmare Moon, but when a lavender alicorn arrives, the mare is nothing more than confused as to why a filly is on the moon with a villain.