The Assassin's Beast
I will start off that I have not finished the whole story yet. I think you have the start of two potentially solid storylines. My largest feedback would be to give readers a reason to care about both of your protagonists. Perhaps you could make them both adults? You define Hunter's age but Grace's is a little ambiguous. I've read a lot of stuff where you have teens in super-dark or angsty, supernatural situations so some of the tropes are used a lot, like a highschool protagonist in the middle of a supernatural war.. Even the backstory you've established for Hunter would be stronger if he were ten years older. A mateless, twenty-something wolf who is staying home to take care of his widowed mother, while working and trying to get an education in a society where he should have settled down a decade ago, could be a super interesting character.
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Take my feedback for what it's worth, it's just my opinion. You have to be happy with your work. Keep working and developing your skills. If you keep working, your story will be the strongest version possible.