After reading these last two chapters its been leading me to believe Tobi could .possibly be Rin. She is an unexplained character. From what we know nobody knows where Obito was killed and that rin was the last to be next to him. It is possible for her to take his other sharingan while kakashi was fihhting the other enemy. Not only that she saw Obito die as well and could be what activated the Mangekyou just like Kakashi. And with what Tobi stated about kakashi and his empty promises left at the grave. The only grave it could be would either be Rins, Sakumo, or his mother. Each which could also know Guy as well. But Rin seems like a candidate. But at the same time im not sure because when kisame saw tobi either he really saw tobi or he really saw madara. Either way Tobi's face is similar to Madaras. So the question still remains who is tobi? And now whether or not he is a female or male. Idk guys im still stumped. I just want to know if anyone else think Rin could be a possibility now.