Servant of the Will of 'D'

This is a One Piece x OC story: Ren is a girl who's left by her father and twin big brothers when she is 12 years old. 3 years have passed and now Ren is 15. Following her ancestors that's a Pirate along with her family tradition of "Servant of the 'Will of 'D'". Ren went on a journey to find this 'D' person and to meet up with her father and big brothers that is in Grand Line.