Itachi Uchiha

Death. New world. The thing is that you got into Naruto's world after your death, in the past world you were killed by accident, you got into the wrong place at the wrong time and ended up lying on the floor bleeding. Light. A bright flash and you found yourself in a familiar world. You are very small but you were aware of everything. In the new world you have no one, you are small and seemingly helpless, but you decided to start from scratch and change yourself. A little while later you got into the same team with Sasuke, Naruto and Sakura, although you considered yourself a little extra 4th, you still tried. After some time, when Orochimaru first attacked during the exam, you remembered that Sasuke would want to kill his older brother, Itachi Uchiha. Of course you won't bother him because you are a stranger in this world, but you wanted to spend time with him, so after Sasuke left the village and went to study with Orochimaru, Naruto with Jiraiya and Sakura with Tsunade, you decided to find Itachi and ask him to be your teacher.