Satrina

Superman has Mister Mxyzptlk. Batman has Bat-Mite, Fred Flintstone has the Great Gazoo, Captain Picard has Q, and the Mane Six has Discord. Now Starfox Earth is about to have a visitor who falls under those same qualifications. Meet Satrina, a cosmic imp who can travel through time and space to different worlds and different dimensions. Like the others mentioned, she has dimensional powers that enables her to manipulate reality in a form of magic. However, most of her mischief tends to be harmless and she will bring things back to normal. But if there is someone who looks like a threat to her fun, then she'll take measures that could be beyond control.

Heightwise, she is only about four feet tall, which matches her child-like nature. How she comes to Starfox Earth is yet to be told but look for a future discovery that could answer those questions.