Board Thread:Questions and Answers/@comment-109.146.62.106-20161209160319/@comment-31.218.90.77-20170628092204

Well I think the answers were revealed  in the newe e revest chapters.

I think that the First Progenitor (Shikama Doji) sired the vampires ranked from the 2nd  progenitors  until the 6th  progenitors. (Since a 2nd  progenitor  can only start & make a 7th  progenitor  vampire)

Well the vampire lives for a centuries before he can be become a  progenitor (the ones who turned by a high ranks such as 2nd,3rd,4th,5th and 6th) , So Mika is a new born vampire who haven't complete even 20 years so he is considered as a noble, but still far stronger than the old normal vampires who turned by a lower  progenitors  because Mika was turned by a 3rd progintor.

If the calclations are true Mika can be 8th or 9th  progenitor  in the future but currently he is considered to be a noble because of his strengh and krul incubation.

I don't know if I am right or wrong but that what I understanded so far from the manga and the novel.

As I remmber that I read in the light novel that Saito planed for Mahiru to become a vampire and sired by Krul (3rd progintor) and explains to her because he can no longer turn humans into vampires and the reason was revlead in chapter 49 (Progenitor's Memory) where Saito shows that he is no longer a vampire and there was no blood when Urd cut his arm down!