Beauty and the Beast (sonic fanfic)

When Eclipse was a child she experienced her parents murdered right in front of her by a fang, when she was hiding from the intruder, the fang found her as well and turn her just like him and cut off her tail being an abusive master. Unable to control her new abilities and filled with grief and pain Eclipse went on a rampage, killing everyone in sight for 2 years including her new-found master. A special unit, that works for GUN, specializes in unordinary cases and cases that GUN fails to execute or too difficult to complete, were sent to eliminate Eclipse, they captured her instead, after learning of her traumatic past because of one of the members powers, the same member felt sympathy towards Eclipse and slowly helped her become herself again and trained her to control her powers. Now Eclipse is a member of the secret unit, doing everything her mentor taught her to keep Mobius safe and keeping herself in check of turning into her worse nightmare.
When Eclipse is sent to investigate the city she encounters a powerful being and is captured, What will happen to her while she is trapped with a cold heartless being as she herself is a monster?