Magic is Everywhere Believe in Me (Peter Penvensie love story) (ouat related)

This is a story about a girl named Petra Pan the granddaughter of professor Kirk and she lives with him and Mrs.Macready in his mansion when the Penvensie siblings come to live there because of the war.
Petra never believed in true love or love at first sight because her heart has been broken so many times she put up her walls and never loved again except for her grandfather.
Ever since she put her walls up she is now cunning,athletic,very strong with muscles and with a six pack for abs,very very smart,always getting into fights at school,never wears dresses or skirts or makeup,pulls pranks on people,always wears pirate-type clothes with pirate-type boots also,she never has a real smile only a smirk (sometimes an evil one)or a frown.
There is one more thing to her that she has a very dark and evil past and has many deep and dark secrets.
Will she trust the penvenise siblings and tell them her past and secrets or will she just shut them out just to protect them from her past actions?