I REALLY hope I'm not the last one who found this out, because that would make me feel like an idiot...
What if Angel of the Oracion Seis is Yukino Agria's sister?
I was derping around, reading chapter 303 of Fairy Tail, and I thought Yukino reminded me of someone... and then I realized OH MY GOD SHE LOOKS LIKE ANGEL.
It would make sense...Yukino said her sister was taken by Zeref's followers, and Angel was at the Tower of Heaven. They also look very similar.
I'm sure someone already posted a blog about this, but since I'm WAAAY to lazy to go back and look for it, I'm posting another one. ^_^