Syrlya just spends a moment in pain. At the least, the queasy feeling from the potion is helping shake the leeway of the fog from his mind, and he's able to remember the preceding days more clearly. He is listening to Foster even if he doesn't look up, but it takes a moment for him to put the pieces together.

When he looks up, Taako is already transformed. After assessing him for a moment, he straightens up with a more confident, if pained, grin.

"Wonderful, you can become the Prince!" Because of course the illusionist thinks impersonating people is a great solution. "Are you able to disguise your voice as well?"