Only child Jonathan Strange thinks that this is all really funny. He's trying to hide that smile on his face and look like a mature, responsible adult but Miko literally stomps into the kitchen, he cracks. Strange grins, a big ol'shithead 'I find this hilarious because I'm not part of it' sort of grin.

"I don't know. If she's curious about the magic, I personally don't mind her watching as the spell's cast. Of course, it is 'weird nerd crap' in the first place."

He is causing trouble just for the sake of causing trouble.