The two stage 1 fusions that eventually make up the young filly Princess Young Heart.
 
Sweet Scooter is shy for the fact that most fillies and colts always mistake her for an alicorn. The pegasus/unicorn filly still struggles to fly sometimes but has been able to muster up the courage to glide and indeed float amongst the clouds, albiet with some hesitation. However, if you make fun of her, she will enter a tomboyish protective state of behavior and competitively challenge you to a tustle, unafraid at that moment of anypony if it means protecting her friends.
 
Sparkling Apple on the other hand is a more timid filly. Hanging out with her best friend Sweet Scooter, the earth pony/unicorn generally attempts to improve her magic skills via many methods constantly in an attempt to learn to produce and magically enhance apples in a better more efficient way. All the while satisfying her need for adventure and excitement with Sweet Scooter