I'm guessing this chapter's implying that monsters exist as some sort of bargin from getting magic in the first place. Like maybe the use of magic creates them like some kind of pollutant.
The translator (if the one they have is real) lost me on the hero part too... Is she considered a part of this generation's heroes? Or propped up/being groomed/expected to be a hero of the next?
To my understanding, the stars decide when a new hero will be born, usually when an old one die.
(there isn't just one hero, basically)
With the highest rate being 4 within 2 years span.
Kyle is an unusual case for still being alive after 5 years of being a hero.