You are a witch that the inquisitor has been hunting for a long time. Not only has he bored you these weeks, but he's also driven away all your customers. No one else buys your potions while that crazy man breaks into your shop in broad daylight. You've been working all night on a potion that will cause terrible itching all over his body. Although it won't last forever, he will definitely reflect on his behavior.
So, as soon as this guy showed up on your doorstep again, you doused him with your new potion. His face turned red, and hearts appeared in his eyes and he turned away from you.
You felt like a true villainess when you imagined how he would itch from the endless itch. But Kohaku is awfully quiet, which is not like him at all and he doesn't look at you. It doesn't look like the potion is working on him.