Lol I love answering questions
1. It wasn't mentioned in the story if the previous nux died but based on jooyoung and the doctor's reaction they were shock, and it is said that the pure vampires are immortal unless they were killed or attempt suicide, and since he jumped off of the roof then he died probably
2. I think it is part of the vampire tradition of a nux to pass their powers to the new nux, and to that previous nux(the nux who disguised as jooyoung and the doctor) He was looking for someone whom he could pass his powers because he said "He failed to control the vampires" and he will resign as nux, and he was planning to make dooyon as the next nux
I'm going to post my observations in the comments just go check it hehe
Loved the story! It’s just after the story ended I had some unanswered questions.
What happened to the previous Nux? He backed off of a roof. Did he die?
What happened to the Nux before the previous Nux? Did he voluntarily transfer his powers over? I didn’t really get that. It sounded like he had a close relationship with Jooyoung but then something happened to him that we aren’t told about.
Also, why did the Ike’s eye color go from black to blue? Maybe it’s just the art improvement haha and I’m thinking too much into it.
The director injected himself with Nux’s blood. What exactly happened to him? I know that Dooyoon can drink blood now and live nicely as a half without needed other essence, but does this mean that the director is Dooyoon’s sole source of blood? Won’t this make the director an easy target? He has special blood, and it’s not like his blood is effective only for Dooyoon.
Why did Jooyoung love Woojin(or whatever dooyoon’s father was called)?
What was the mistake that the sharp looking vampire(Jooyoung’s lover) did to Jooyoung in the past? They mentioned something like that when Jooyoung asked him to go with him. I don’t think it was only the thing with him not giving Nux’s blood.
Anyways all in all great story! It’s a shame that there’s some plot holes, but understandable because of the author’s condition. I loved the art, the improvement was amazing!! Thanks author~nim