no one else in the manga completely covers their face except when they don't want u to know who they r
mask or not everybody has somebody who knows who they are. even the anbus are able to recognize each other!
alot of ppl cover their face and say who they are and everybody goes by it!! we have never ever seen Kakashi's real face and everybody is fine with that!! how do you know Kakashi is Kakashi?! how do you know Shino is really Shino?!
Obito is dead killed by boulders. Izuna is dead eyes gouged and died that day. Danzo is dead killed by Sasuke. Tobirama is dead probably during the 2nd war or idk. Zetsu's are Zetsu's and Tobi is Madara!
answer this why does Itachi, Kisame, Konan and Nagato believe Tobi is Madara?! Kisame has seen Madara's face twice! Itachi has the sharingan and very knowledgable about Madara and the Uchiha past. Nagato worked very close with Madara and at one time was probably the only one that knew that he was running the show. Konan was also very close with Madara and knew him so well she figured a time frame to his space-time justu.