INFORMATION: Aurora is actually a parallel Kirystal that came from another reality. During certain events the star jewel suffered massive damage and created a space-time distortion, bringing in things from alternate realities. During this any lifeforms that were brought in through the distortion would die. However Aurora, having her powers, she cloaked herself in her powerful aurora to protect herself. Thus allowing her to survive the travel. Also when she has some sort of emotion, her color will change to match that.
I spent sooo long on this (Why am I so proud of the sword lol)
