Originally Posted by cursesealer
Just a thought but could the blue hair chick be Rin? She could've dyed her hair blue is all. For all I know she could've had a crush on Obito and joined Aka in some coup agreement.
I actually thought the same thing as well, but Kakashi did say that everyone close to him was dead so it's unlikely. Anyway, all we can do is speculate at this point. I hope we see her/him in action soon.