Aradia hadn't minded offering her spare time when Clara finally tracked her down. Only knowing the basics of the situation wasn't really a deal breaker - finding things was fun and makes for decent manifesting practice, and she could always try to pry further details out of Clara's mysterious friend if things start looking shady. And if Clara trusted them, then they clearly couldn't be that bad.

Right? Right. Flawless logic.

"Hope you don't mind that I came with. She thought I could help out a little." Meeting in a graveyard at an absurdly early hour doesn't even rate as surprising anymore, though she does note that maybe Clara didn't tell the stranger beforehand that Aradia'd be joining them. Oops. "At least as far as a ghost can, anyway. But I can go if that's a problem."

Might as well offer a way for her to leave, even if she's oddly curious about where this could head. It's only polite.