How has buttercup's beauty changed in the three years since she has agreed to marry prince humperdinck?

In the three years since Buttercup agreed to marry Prince Humperdinck, her beauty has become more melancholic and subdued. The weight of her impending marriage and the constraints of her situation have robbed her of the joy and vibrancy she once possessed. While still beautiful, her appearance reflects a deep sense of resignation and longing, contrasting with the passionate spirit she once had. This transformation underscores the emotional toll of her circumstances.