Board Thread:Questions and Answers/@comment-5693502-20160425161448/@comment-25942629-20160501093704

I don't know. What I do know is that Kureto was trying to force them to become demons by starving them and exposing them to sunlight. Krul always warned Mika that a vampire who goes without blood becomes a demon. I don't know if a vampire as young as Mika can become a demon or if a vampire who lives for thousands of years is more likely.

So many unanswered questions in this series! It's definitely easy to see that Kagami-sensei is much more experienced with writing LNs than manga.