The Harper Dilemma.

Here's the thing: I want all my characters to be unforgettable but especially my protagonists. Lately however, I can't help but feel that Harper (my protag) is another dress-hating dirt-loving biker chick like  all the girls in Sydney White or Mean Girls 2 or So Undercover (or even the Hunger Games, Divergent, Twilight) and I really do not want her to seem like a character I pulled out of a chickflick if ya know what I mean.
But then again this personality is necessary for the plot and character development, I mean I don't want her to undergo some epiphany where she evolves into a normal girl halfway through the book like most of the movies I mentioned before but I don't want her to be a carbon-copy of all of the gitls from the movies I mentioned before.
I don't know why everything is going so wrong I mean Harper was always a solid human being in my head I had no problem defining her but now not only am I unable to define her, I just can't seem to portray that definition in my mind onto paper!
Harper how do I bring you into the real world I mean not even mothers have this much problem giving birth shdjhdripjdsfgx.