Put her under

Henry stood up and approached. Edelgard clearly believed there was a real crowd she was talking to. For him, it was going to be a bit harder since he would need to act towards his otherwise empty office

"Thank you, my dear! Yes ladies and Gentlemen, tonight is a truly special show where I will hypnotize my lovely assistant here! It's sure to be a spectacle for you all!" He declared as he began swinging a watch in front of her. After a few moments he simply said

"And sleep!"

Her head dropped, and her body went limp, beginning to collapse. Thankfully Henry managed to catch her before she fell.

"Woah now. Any time I tell you to sleep, you will remain balance and standing" he said. Though he had to admit his heart started racing with her cradled in his arms like this.