"Yeah. So," she opens the book and starts leafing through it to remind herself, "this thing says that in the beginning, demons roamed the Earth, controlling vast armies and territories, fighting each other, and terrorizing mortals."

"'In the beginning'? ... I thought the other book was the mythology book."

"This one is about vampire mythology. It doesn't say much about what that time was like, but it says that, when the demons were beginning to lose their hold on this realm and flee to other hells, one of them decided to mix its blood with a human, creating the first vampire, so that his hold over the earth would remain."

"... I'm guessing that doesn't work with all demons? Admittedly, I haven't tried, but. I hope it wouldn't work?"

"Probably not, what do you mean you haven't tried?"

"He's, like, part-demon or some such."

"Oh."

"I thought that was clear from me talking about how fabulously magical I was in the cafeteria. Yeah, we're pretty sure I'm part-demon, what with the nails and the teeth and the grace and the growling."

"Yeah I remember you saying that, but I thought you were joking."

"Oh. Yeah, no. I'm fabulous and magical. Or, y'know, demonic. Funny, I don't feel very demonic."

"We've had this conversation."

"Aaanyway. The book says that the Slayer started existing around that time, but it's very vague about her."

"Yeah, well, at least it's not going into reasons why a single teenage girl is such a great idea against literally all the vampires. I'd probably be tempted to go strangle him."

Theo looks at his nails, making gestures like he's trying to work out how best to injure someone with them.

"...what are you doing?"

"What do you mean?"

Still focused on his hands. It looks like he's trying to dig into an imaginary neck.

"You're doing a thing with your hands."

Sadde for his part is watching this with interest.

...with minimal movements, too, he's still sorta flopped on the couch, but he's definitely interested in what he's seeing.

"Hm?" he asks distractedly, turning to face her and dropping his hands.

"It looked like you were trying to strangle an invisible person."

"No, he was using his nails on the invisible person."

"Huh? ... I was just looking at my nails...?"

He looks down at them again, a bit confused.

"Wow you're good at self-delusion, you should probably work on being less good at it."

"What? I literally just did this!"

He starts opening and closing his hands, closing them to 'I'm going to claw you' level and then evening them back out again.

"Yep. That is indeed literally what you just did."

"Yeah, so what's the pro—" he starts, then actually seems to realize what he's doing. "Okay, I get your point about self-delusion, what the hell, me."