Then Sable will stand, push in her chair, bus their cups and Alethia's plate, and then hold out her hand to Alethia.

And Alethia will take Sable's hand and let herself be led off.

Sable is deeply weird, much like Alethia is. It's nice, not to have to worry about- all sorts of things.

All five Pirates are definitely enjoying all of Alethia's weirdness, too. It's nice how these things work out.

Sable leads the way down a few streets, and then turns a corner to find a cute little park. Midway into it is a cute little grassy hill with a lovely view of the river, nestled in the middle of a copse of trees.

Sable reaches into her bag and pulls out a large blanket, which she spreads across the grass.

"Tada!"

"You had a blanket prepared! That's adorable! And sweet!"

Sure, planning out a date isn't, objectively, anything strange or abnormal, but Sable did it for her! And she took her to a cute park!

Sable smiles warmly and sighs fondly. "I'm glad you like it." 

And after a few moments of just enjoying sitting on the blanket together, Sable stretches and turns to Alethia. "I do have some full-disclosure things that I ought to share with you. They're not exactly in the usual search space you'd assign most of your probability to, They're rather private, which is part of why we've come to a secluded park. The other part is just that it's really pretty here and I thought you'd like it."

Is this the part where she reveals this is a nefarious scheme to steal her kidneys?

"Ah. That question at the start wasn't as hypothetical as it sounded, then. Well, I'm glad you're telling me."

She looks around for a second.

"It really is pretty, and I do like it."

"I'm glad."

She stares at the water for a moment, then nods to herself.

"You might've noticed while we were walking here that my hand is a bit cold. And firm."

Oh. Is Sable- does she have some sort of illness? Is she okay? Is she about to say that she only has three years to live or something? Poor circulation and abnormal muscle tension, does she know anything that causes that-

"I- the handhold wasn't tight enough to feel the firmness, really. But- I did notice your hand was cold."

She nods. "There's a reason for that. Let's give you a few more datapoints."

She stands up, takes a step off the blanket, and then suddenly vanishes, appearing at the end of the clearing in an instant. She pauses there, catching Alethia's eyes, then vanishes again to the opposite side of the clearing, crossing the entire space in an instant again.

"Cold to the touch, and superspeed. I can do a series of dashes to arbitrary points you specify, if that would help you better rule out the possibility that I could be doing some kind of trickery or misdirection."

It seems like a mistake, at first. Her eyes somehow playing tricks on her, her mind stuttering.

It's suddenly very obvious that whether she leaves this clearing alive is entirely determined by Sable's opinion on whether she should.

This realization shows on her face not at all.

Cold to the touch, and fast. What does that point at? Vampirism? But she mentioned feeling firm, are Vampires supposed to feel firm? She doesn't think so.

She doesn't even really feel nervous. Startled, certainly, but the flash of realization that she's left the world she knows behind has centred her, somehow. In an odd way that doesn't stop her from feeling a bit distant from herself, but she's calm.

"Hmm. Speed would imply strength, under most methods by which you could be moving that fast."

It's so nice to watch her reason things out.

"Correct. I'm not properly human, anymore, and the particular kind of former-human I am does not exactly match the usual tropes of the species. Would you like me to keep giving more clues or tell you outright now? I'm quite enjoying watching you reason things out, but your comfort is the priority here."

That's sweet. 

She's going to put the "former human" thought out of mind for a moment, she has a plan.

"I think I'm still in the "finish proving to myself that this is all real" phase, actually."

She looks around for a second and- yeah, there's a pebble just there. It doesn't need to be a large rock.

She picks that pebble up and rolls it between her fingers. Then she pinches, hard. Hard enough to hurt herself, just a bit.

Yeah, this is a genuine actual pebble, and not likely to break.

She tosses it to Sable.

"Care to pinch this to dust between your fingers for me?"

She catches it deftly between her thumb and forefinger, pinching it from its trajectory, then holds it up for a moment to make sure that Alethia's got a clear view of her holding it, before finally pressing her thumb and finger together, not seeming to exert any effort.

The stone crumbles to powder, and she catches it in her other hand as it falls, then walks up to Alethia and holds out her powder-filled hand.

"Well. That would be very difficult to fake. Do you have any other obvious impossibilities to demonstrate for me?"

She didn't ask that question first because, well- of course a Sable who was lying would have something else prepared in case Alethia asked just that question.

At this point, though, she's pretty sure of the end conclusion that she'll come to. And thus pretty sure that Sable will, in fact, have some third thing to demonstrate, and it will be at least as out-of-distribution as the first two.

She hums and nods. "I do have one quite blatant feat to show, but I ask that you only count it as evidence of my being broadly supernatural, not as evidence for or against a particular subtype, because this particular ability is unique. Fair?"

"Fair enough."

Unique, what does that say? Does that mean that question earlier about "one superpower" was more meaningful than she'd guessed?

As a matter of fact it was. Many things said today were.

"Some people have one unique bit of magic all their own. They're typically called witches. Becoming my kind of supernatural will occasionally unlock magic if you didn't have one yet, or will enhance it if you do."

And then her body shifts. She becomes a good bit shorter, a bit more slender, and her hair shortens and darkens.

Until a petite girl with messy black hair and piercing green eyes is grinning at Alethia.

What.

"What."

What?

"Wow. Well. That's not the kind of thing you can fake."

Hailey snickers and shakes her head. "No, it's really not. This particular ability has a very complicated story behind it, and has a limited set of target shapes. Be glad to explain it, but let's focus on the main thing first."

She shifts back.

"Any other questions or tests you'd like to see? I suspect we've very thoroughly proved the existence of the supernatural, at this point, but further questions or tests may help you validate or falsify any theories about what particular flavor of supernatural thing I am."