Cherie actually didn't know that Ybur had just taken advantage of the chaos to launch a sneak attack — in her view, it was just Clara suddenly drawing a gun, so out of self-defense, she had no choice but to release the Hypnosis Pattern.
But this spell was actually a rather fragile control effect. Once the subject was stimulated, they would immediately break free from the control; and even if they weren't stimulated, the duration of the spell was not long, only a few minutes... When Clara came to, how should I explain it?
Cherie's thinking lasted only a very short time.
The surrounding darkness suddenly condensed, and Saraphido's gloomy voice emerged from it, "I was wondering what was going on before, it turns out there were two little bugs here!"