(His bewildering, wondering expression makes her laugh. People here often have this kind of reaction to magic and she's assuming his surprise neatly falls into this category. Also, she's really down with his readiness to team up!)

Uh, when necessary? It's a weird thing to just uh, bring up– come here?

(She reaches out toward him, resting her fingertips on his shoulder so she can cast stone skin. That'll give him a good boost.) Bit of mobile projection there. Okay Finn, I'm going to lift this shield, but there's plenty more where that came from so just... go for it.