Since a long time ago, he and his wife have concluded that their daughter who was even eviler than them had no weaknesses.
This conclusion came as a result of their failed attempts. He can recall the numerous of Michelle's maids and bodyguards that have died because they wanted to use them as her weakness. All these maids and bodyguards all ended up being cruelly murdered by their master, the princess. She kills them without batting an eye to show that Supreme Beauty had no weaknesses. After over twenty of her personal bodyguards and maids were killed by her, they had given up on finding her weakness since they knew very well that such a thing never existed.
