The Emperor of Croysen hated Empress Yvonne. Enough that he'd wish for her to disappear three times a day.
He doesn't like the face of someone who looks just like the Duke of Delua, his enemy. But no matter how much he insulted her, her indifferent and aloof character stayed the same, which made him feel even more terrible.
He didn't care whether or not she disappeared or died. He was fine with anything as long as he didn't see her face.