unique in similar sense to Torque's Hatred? (it is 'technically' Malefactor but unique)
so when Infernas die, it is only their 'Malefactor' forms. Their spirit/ghost/noncorporeal forms would just simply return and reform again and again. That is what I am getting from you, right?
by contrast, Hermes is a ghost and not a Malefactor, correct?
if they are same recurring characters as you claim, I suppose you can make an article of them. But are you CERTAIN AND CONFIDENT that they are same girls?