Right, people do need some way to find you if you want to do business with them.  Still, she might have been overcautious with Alexius but she's definitely not giving this boy her room number.

Aaand by the time she's gotten a sentence together the conversation has moved on, convenient now but she needs to get faster at that.  "I can find you at lunch then, too, to talk math?"  Aaaand a library run, which would be great if he's on the level but tips it hard toward too good to be true. 

"...while you're here, would you mind seeing if that's something that needs dealing with?"  She points to the weird puddle at the end of the table, marked off by its double perimeter of green beans.  "We weren't sure if it was an ooze or what's left after someone killed something or, like, I dunno, a really depressed flan."

He looks it over.

"Leftover from something dead, don't touch it though, could be toxic."

He heads off to another nearby table.

Once he's out of earshot, Connie leans closer to Alexius and murmurs "That was weird- that is weird, right?  Did you get the talk about giving stuff away free too?"

"Yep. I - " have reasons to want to be targeted by maleficers, he absolutely cannot say, lest he tip one off inadvertently, " - think it's worth taking a risk over, myself, but we can't afford to forget it's a risk." 

"Yeah."  She frowns and starts disassembling her lasagna instead of eating it.  "I did come here planning to swap for junior and senior math homework, wouldn't've made sense to spend time on it otherwise, but- I don't think I like this.  We could... try and find some more kids to go with, maybe?"  She doesn't sound confident in this plan.  "Or just... decide ahead of time we're definitely not going into the stacks?"

"Reasonable. As long as we stay to the center of the library with a lot of witnesses it'd be unlikely for a maleficer to try anything. And if he tries to change our minds, that's a red flag." 

"Yeah.  I- like, it would be really normal for his friend to be waiting at a carrel somewhere?  But 's also normal to not trust that, right, so if he's on the level and just weirdly friendly he'd understand."