I think that kisame called :hypertobi: mizukage just because he respects him.
I think he called him bcz he might have been mizukage or evan is...
We still dont know any thing about them.
May be next 2-3 chapters will unrevealed the secret:hypertobi:
But i still dont understand why naruto has not asked kakashi about his father?
Do u have any idea
:akatsuki: