A name for my character(s)? Please!?

I have three characters so far for this book I am writing.
1: A young girl around 15, 16 maybe 17 she's smart, also a quick thinker, always thinks before doing, and deeply cares for her friends. She has straight mid-length medium blond hair, Deep blue eyes and is fair-skinned
2:Best friends with 1st girl, same or close to the same age,
also smart, quite intelligent acctually but is easily hurt and is in a deep depression caused by her father who abuses her sexually and physically(hits, punches, throws things towards her etc.) she has light green eyes, chesnut color hair, tan but not to tan.
3: the father of the 2nd girl, heavy smoker and drinker abuses girl 2 and doesn't care much for anyone. He has brown short hair, brown eyes and his tall and well-built. He even kidnapps, rapes girl 1 and kills girl 2.
This is a very sad story and also very suspenseful.
I also would like to ask if you have any thoughts on what I should name the book. I've thought of 'Pain' but thought maybe somewhere some one already used that title. Your answer is much appreciated so thank you in advance!
(:LillyBarnes:)