Why did Obito chose to call himself Tobi? I have been wondering about that for some time now xD.. Could it be related to Tobirama? (2. Hokage) The only usefull things we know about Tobirama is th at he's the creator of Edo tensei. Could it be that Tobirama was the one who killed Izuna & maybe that made Madara turn evil? And then Madara told some stuff to Obito about Tobirama and thats where he got his alias?