Although the Batman needs to support Gotham. Bruce Wayne needs support too. Who's got his back?

Aria Wayne's life turned upside down when she was 6. After losing her parents, Aria vows to never lose anyone she cares about again. To keep that vow, Aria follows her brother through thick and thin, eventually learning of Bruce's alter ego. She creates an alter ego of her own to protect Bruce as he takes on Gotham's criminals. [Prequel novel included] [Rated 'T' for violence]