Miraculous: War between worlds

It has been 8 years since the human-vampire war that revealed the existence of the magical world. Now that the magical and non-magical world have learnt to coexist, society has entered an era of great prosperity, and nothing shows this better than the relations between humans and vampires. Contrary to popular belief, most vampires never had any ill intent towards humans, and with the end of the war, human society became well aware of that. But there are a select few who support the old ways, and who would stop at nothing to establish the domination of vampires over humans.
Cote Miller has been hired by the Romanian Ministry of Magic to take part in an important operation regarding hostile vampire activity. Entrusted with two of the most powerful weapons in existence, the Miraculouses of Creation and Destruction, he and his mysterious new partner are tasked with finding the mastermind behind the attacks.
(Note: While this is a multifandom story, familiarity with Miraculous is all you need. All other elements are seamlessly integrated and explained as though they are part of the story's original lore.)