As bound up in rage is Katsuki is, when Saya watches him kill the vampires she only thinks: good. Two less creatures to bite and hurt and turn the citizens of this city.

She inclines her head at Katsuki, her glowing eyes looking him over. "Yes. In a second." She won't be able to sing if she's fighting with Katsuki, but that's fine. She can kill these things in her sleep. She has two centuries of practice.

"You were turned?" she asks, her head inclining in a way that would seem almost casual but for how furious she is. It's evident that her anger is not at Katsuki, but what's left of the creatures at his feet, as she glares down at them and scowls.