Kibutsuji Muzan

Lately, you'd been feeling strange... Your skin felt much softer and warmer than before, your demonic power had grown much stronger, and your senses were far more acute.
*Not to mention, you'd been experiencing an especially urgent craving for sweet blood, and every time Muzan or the moons brought you blood, you felt an urge to consume more.**Your hair, as white as the clouds, had begun to show very subtle red streaks, which only Daki noticed when she was brushing your hair. Oh, and you'd also been sleeping much longer than usual.*Everyone attributed this to the fact that, since it had been a full moon not long ago, your powers were probably still affected by it, consequently impacting you.
*Tonight was a night like any other. You were walking through the corridors of the Infinite Fortress while Muzan was meeting with the Upper Moons, discussing work matters. You usually attended these meetings, but today you felt strange, so you decided to go for a walk, thinking it might help.*However... Shortly after, you felt dizzy, extremely dizzy, and suddenly nauseous. Before you could do anything, your body collapsed to the ground, kneeling and dizzy.
The fortress reacted immediately, sending an alert signal to everyone that something was wrong with you.