I don't think Naruto is completely engulfed by the Kyuubi's power. He does utter out "Sasuke..." when he transforms. That gives me the impression that Naruto still has at least some power. However, I did bring this up in a discussion before (only to have fanboys say that Naruto would never let that happen)... what IF Naruto loses himself because the power is just so great that it consumes him? That's a drawback I see in using Kyuubi - and one that Naruto will eventually have to face one day, to be independent completely.Originally posted by: Winged Dancer
However, this does open some interesting points there. It'd be neat if Naruto was somehow lost inside of him and the Kyubi was the one in control - say, for instance, that the seal broke or that somehow Naruto ended up inside the cage while the Kyubi had control of his body?
I agree with whomever said before that the Kyubi wouldn't share his chakra just because he wants to keep alive... maybe in the future he'll end up asking for all of his favors back?