i cannot believe i was so fckin blind.
SHISUI UCHIHA IS TOBI(dun dun duuuuuuuun)
it came to me like a second ago, but shisui was feared for his body flicker jutsu(probably copied from minato) and coincidentally tobi has a v.good one aswell.but all you would have to do is mix in a bit of genjutsu to give it that fancy look
it is the most likely reason why tobi is using sasuke to kill danzou, so he can retrieve his eyes(or use sasuke as a scapegoat to catch danzou of guard)
just bcus some1 says they are a person, doesnt mean they are