After meeting the maid, Irene gave the maid a vial of sleeping potion. From what Quin said earlier, it was an SS grade sleeping potion that was very expensive. It could affect not only humans but also vampires, and other superior beings. Sadly, the best witch tower could only produce a maximum of three every decade since the ingredient was so hard to grow.
Irene sighed. Quin might not know this since she was so eager to mess with Ayana, but she could feel a little regret in her heart. It was a rare potion and so expensive that they couldn't buy it whenever they wanted, but Quin just used it for this useless situation. She thought it was a useless situation until she realized that Ayana was immune to the sleeping potion. A normal human would start to get sleepy after finishing the first glass, but Ayana did not react at all.