Margaret Peregrine is a high school sophomore. Most of the time, she's either at school, at the school robotics club, at the school chess club, or doing schoolwork. Today, she's cleaning out her late great-grandmother's attic.
"Sure am. I don't think we've met; tell me about yourself?"
"Good to meet you, Tom." She looks at both of them. "How're your days going?"
"Cool, cool. I'm thinking of going to the arcade after school today, get some ice cream, play some games. Want to come?"
"Nah, not like a date, just hanging out."
"Cool. Got any guesses what we're doing in gym today?" She'll make small talk and eat her lunch for a while.
She arranges a meeting spot with Kevin after school. Gym is in fact running; she makes sure her medallion is thoroughly wedged down her gym shirt and wonders if exercising in one of her shapes makes the other one tired. They don't seem to need to eat separately, so there's clearly some sort of interaction.
That's alright; the goal was to get him relatively alone. She lets her medallion fall out of her shirt during DDR.
"I found it in a relative's attic", she says, tucking it back away. "I really like it; I never take it off."
"Yeah, okay." She fishes the medallion out again and holds it out, keeping a tight grip on it in case he makes a grab for it for some reason.
And right back into the shirt it goes. "No way. It was my great-grandmother's, it's important to me. I'd actually like to learn more about it, though, none of us know where she got it. So if you know a guy who has more like it, I wouldn't mind talking to him."
"Have you ever seen one like it anywhere? For that matter, can I see your necklace? I noticed it in gym class, I bet it looks pretty neat."
She sighs. "Listen, we both know more than we're letting on. What if I told you this wasn't just a normal necklace? Because I also have medical reasons for keeping mine on all the time." If he doesn't know what she's talking about he'll conclude that she's nuts, but in that case she doesn't lose more than an already pretty fake acquaintanceship.