One thing that most situations involving Vampires I have seen in fiction (Including most D&D conversions I have seen) is that if the Vampire converting the living does it intentionally the converted does act somewhat like a child, at least they are impressionable from their "parrent" most works I have seen usually use the words Sire and Childe, because of this. As such since our Vampire in this case seems lawful we might just see Belker turn Lawful, although it will take time and exposure to Malack... I fear what would happen if Nale somehow becomes the one to influnce Belkar... given Malack's past in regards to Nale and his children... well...