After the defeat of Kinkel, it's confirmed Hazuki is a true daywalker (she doesn't need any tricks to avoid sunlight; it doesn't burn her); it's the reason she was kept prisoner in the castle, to keep other vampires from finding out and trying to drink her blood to gain her power. As a bright side, Hiromi and the editor in chief are free of Kinkel's control, but lack memory of their time under his control.