Fly was impressive. At first, it looked ridiculous on the back of her Seal Cane, and I was like "Why can't it be [spoiler, sorry, cannot include]?" And lo and behold! It happened! YAY!!
My favorite card is Mirror. Out of all the cards, Mirror was the only one that had any character development whatsoever. And the crush Mirror had on Touya... one of the sweetest things I've ever seen.