Strange gives Syrlya a look like he's a goddamn moron.

"Syrlya, you're a plant person who has bits of the Rose growing from your arm. If the Rose Queen was able to manipulate Steven to control the Rose from afar, then course she'd be able to manipulate you. You're staying in the carnival."

That's all he's saying about this, as he blatantly looks away from Syrlya and turns his attention back to Childermass, Lambert, and anyone else who's talking.