Yume was quiet for a moment before she spoke again. "I had a long-time disease that is fatal to humans, the demon lord's attacked me when I was little and gave me this diesease somehow. Because I wasn't human, it given me different symptons. It gone now, permanently since Yukio and Freya helped me get rid of it with my potions making. So don't worry about it..." she said, it was clearly there was something else other than the disease.