Princess Twilight Sparkle

Princess Twilight Sparkle is a main character of MLP: A Royal Pain. She is a crazy, spoiled princess.

Personality
Twilight Sparkle is described as a crazy, spoiled princess. She has a raspy voice, which furthers her crazy personality even more. If her emotions are toyed with, she gets even more upset. It is revealed the only way to win her infection is getting her a pet kitten.

Spike
Twilight treats Spike like her servant.

Princess Luna
In Cake Monster - Part 2, Luna and Twilight help get Princess Celestia snap out of her cake craze.