if i could choose one mentor whether dead or alive real or fictional i would pick kakshi because he stuck with Naruto through thick and thin and he knew what to do make Naruto stronger he taught him the way of the ninja. It would be nice to have someone believe in you that much so you can live thinking you can do whatever the rest of your days when Naruto dad sealed the nine tail demon inside of him it killed hes father and his mother so nauto was left with nobody and for him to that is awesome.