Yeah this thread popped up overnight.
We have announcement specifically regarding new works' plot and spoilers.
Thank you, Gunlord.
Having said that, a 'good' person turning into a new life as a Vampire has been explored. To a degree, it has happened in the new Interview with the Vampire series (and the old movie with Brad Pitt as well), plus in shows like True Blood, where you have a good person that now has to be forced to feed on others to survive.
And then you have funny moments like in Hotel Transylvania, where Dracula says " Human blood is so fatty, and you never know where it's been! No, I use a blood substitute. Either Near Blood or Blood Beaters. You can't tell the difference."
I'd imagine eventually some kinda TrueBlood drink substitute would get clandestinely synthesized, eliminating the need to feed. If we can have synthesized meat substitute, it can happen with Blood. Or pay money and get Plasma.
But yeah back to Tera and Mizrak, they're going to have to get accustomed to their new life and cope with what's the morally right thing to do, while still being able to live. Most people in these cases would probably feed on criminals or 'bad guys' or something to that effect.