Sakuras real father

Sakura has never met her parents, her mother died while giving birth to her and she has no idea if her father is even alive.

But she always has this nightmare about a man, a snakelike man always bend down over her crying body and whispers ''Daddy is here now, you don't have to be afraid anymore'' The man hugs her and rocks her crying fragile body back and forth while repeating those words.

Who is this man in her dreams. Will this pink haired ninja from Konoha ever find out.
Will her resting powers come to life? Who will teach her about them?