Based upon website info (as there was not a chapter on my campus, or in So Cal that I am aware of):
Delta Phi Epsilon
I love the 'be true to who you are'
& superficially purple is my favorite color & I've loved unicorns since I was a kid.
I actually saw a pendant once that was a unicorn on a crescent moon that I thought was really cute
Based upon prettiest badge: AXO