Probably because not only do I love butterflies, moths, and nature (even though I don't touch grass as often it's still gorgeous imo).

Many people love butterflies because of there gorgeous beauty

Vibrant colors..

And gentle/delicate flight. They also symbolize metamorphosis (transformation) into something completely new.

butterflies are seen as calm and gentle insects and give off a peaceful vibe.

Maybe its also because of her colors?

The baby pink wigh the aquamarine wings and purple clothing does sit her peaceful personality quite a lot (imo).