Mayerling wraps his cloak around Falco and gently leans against him, offering himself as a place of comfort and support.

"Yes, vampires."

He looks down at Falco.

"I'm a vampire."

In case Falco hadn't picked up on it from the way he dresses and all the other dramatics and clues Mayerling flaunts. He's never hidden it, but not everyone comes from worlds with vampires.