It's going to be a little difficult to make even a tiny hole (unless Kyoko has fairly sharp teeth), but it isn't impossible! So, a very tiny hole will eventually be made. There's instantly the sound of a quiet fan running, preventing any immediate deflation.

"Oh dear. Causing harm to anyone is very forbidden. Unless you stop now, I will be forced to sedate you."

He does mean forced in a fairly literal sense, given a passive approach will earn demotion. But, unlike many, he prefers to give at least one more warning.