I love Sora because of the atrocities. The way unreconciled grief destroys someone, so wrapped up in a 'eye for an eye' than she became worse than the person she wanted to kill. I love the tragedy in that! I hope one day she sees her sisters spirit, and all Crane can do is look at her in disgust.
I think there's something about Mizuki and rain/shielding people from rain with an umbrella that i can theorize on but my braincells are not on it today