Rose Tyler was not the mystery; there was nothing mysterious about Rose Tyler. Bad Wolf was not the answer to the question of “Who is Rose Tyler?”
Rose Tyler was the answer to “Why are we being followed by Bad Wolf?” She was the solution to the mystery.
She did extraordinary things just by being an ordinary person.
um Rose Tyler could only save the world through the TARDIS and Bad Wolf using her as an avatar… Clara’s mystery ended up being just her saving the Doctor through her compassion and love for him… Clara was actually more in control of her actions than Rose was in their respective moments