"If you were at home, you were safe at least, and that is all I can ask, I suppose, hm?" A considerably mild answer, compared to what he might have gotten months ago. But Yotsuyu had been learning, in all that time.

A fact that was better illustrated by the way she looked over his notebook, brow furrowed. "'Tis true that I am no great talent in Fantastics, but..." She beckoned Aaron closer, pointing a well-manicured finger at his notations. "The diagram is nearly correct, but you have misallocated a number here, and so it should be more like so." She rubbed out the offending number with a bit of rubber, checking her work while she transcribed the proper sum with a graphite stick.

"It will be a bit wider. Like this." She traced the diagram through the air with her own fan, but did not speak the accompanying equation, so the spell didn't go off. "Too hasty. With Modification, it always pays to double- and triple-check your math. Precision is important, here."