Minerva's glassful shield.

You were poking around in his business. Mages get peevy about that, especially when they're not being good citizens.

He told her she could sleep in if she liked. “Mmmkay,” she said without opening her eyes, and he kissed her good-bye.

Q. How do you establish that? A. By the showing of the two layers in the paper and the zigzaginess of the tear. When you tear paper you don't get an even tear. You get that tearing situation (indicating).