Purple

Ghoul Investigator Rui Beaumont has a predicament.
Bide by the job he assigned for or try his luck with a stunning ghoul hybrid known as Midnight, her real name unknown. Although a silly idea, Rui thought that instead of killing ghouls, most just needed to be understood.

Midnight, AKA Lunar. This Shepherd wasn't always a ghoul. After being surgically turned ghoul, her life changed for good. Now craving the flesh of the animals around her, hunger often tormented her. Afraid to hunt and keeping a low profile, she only ventured out at night. Hence her code name.

When the pair of canines finally do meet, things get heated, truths are revealed, and a possible alliance is formed.