MLP Twilight Sparkle as Butterfly My Little Pony

Twilight was born a Unicorn and was inspired from a young age to learn magic after witnessing Princess Celestia raise the sun at the Summer Sun Celebration. She took the entrance exam to enter Celestia's School for Gifted Unicorns, in which she had to magically hatch a dragon's egg. At first, she was unable to do so, but a burst of energy from Rainbow Dash's sonic rainboom outside unleashed her magical potential, causing her to start firing off spells uncontrollably until Celestia was able to reach her and subdue her magic. As a result of this, Twilight gained her cutie mark, and Celestia took Twilight as her personal student.