OKAY SO I HAVE LIKE A TONNE OF ISAAC FEELS. A tonne. It's kind of shameful, actually, how many Isaac feels there are. He's one of my favourites of Teen Wolf.
Canon-wise, especially for the point you've got him at, you're doing an amazing job. It's really easy, with characters like Isaac, to focus on certain parts of them to the exclusion of development and growth and multi-dimensionality and you haven't done that. You've let what his father did to him be a part of him, but not the definitive part, not the part that is going to make him the kid he is here in Marrowood or back in Beacon Hills.
You're dealing with his insecurity and his anxiety and his fear in a way that makes sense for him--and ties in how important emotional state is to werewolf transformations and if that isn't amazing and cool, I don't know what is.
I know we only have one thread right now, but I can't wait to do all the threads ever. Isaac and Bucky. Isaac and Stiles. Isaac and Mercy. I can't wait to see him with other people. He's a character with so much potential and I can't wait to see it unfold.
Basically, I am so excited you're here and he's here and you're doing such a good job. c: More, more, more!