"Nope, I never lied even when I was banking on my magic messing with your head and making you not believe me."

"I mean, I'm not sure how much it actually messed with my head – it's not like people usually get magic, so that's really not a good explanation to have for 'someone manages to change quite dramatically physically' – something like 'is really good with makeup' is probably a lot more plausible." Shrug. "If it had happened right in front of me, maybe?"

"It did, a few times, actually."

"… Huh. Really?"

"Yeah. Subtler things, though, especially eye color."

"What, do you feel more like being blue-eyed some days and brown-eyed others?"

"No, but my eyes change color to reflect my mood. Skin sometimes, too. I was basically all white when you died."

"That's– um, kinda weird and I'm sorry that it was that bad for you?"

"...how wouldn't it?"

"Be that bad, you mean?" Shrug. "I don't know, I was just– some random student at some new school you'd moved to like three weeks ago."

"A month and a week, actually, and I get broken up about any deaths, and deaths this close to me are particularly terrible."

He nods. "Well, I'll try not to die again. Not that I was really expecting it the first time."

"I appreciate it."

Small smile.

"So, vampires invariably have fast healing in fiction."

"Yeah. So I should probably try stabbing myself – not burning, that sounds like a terrible idea – and seeing how long it takes to heal! Woo."

Sharp knife? Presumably. A less sharp knife will likely not cut him properly.

… Unless Sadde has objections.

Sadde is a bit queasy about cutting Theo but yeah that's what he's thought too.

Theo was not suggesting that Sadde cut him, just checking he doesn't object to the idea of Theo cutting himself.

And so he does so! Or at least tries. His finger. Tries to cut a line on his pinkie.

It takes a couple of seconds for it to be healed.

"Cool."

"So apparently I do have super healing, huh."

"Pretty super! I wonder if you have actual regeneration but wouldn't like to test."

"No, nor me, not really." Shrug. "If it comes up, though, it would definitely be useful for me to have it."

Pause. "Um, anyway, this has distracted me slightly from the 'how to stop me being evil' thing, so what do we test next to find things that can neutralize me?"

"Holy water and other holy symbols, various herbs, we should see whether you're unable to enter houses owned by humans, garlic..."

"Yeah, okay," he says. "I think I have garlic and we could try doing a makeshift cross for a quick positive test."

So he looks around in the fridge and manages to find some garlic.

Which fails to bother him in any supernatural way.