Ayo Shiro (๑'ᴗ')ゞ I thought about how to help you with your writers block and came up with an idea were you can choose between which idea you prefer, but it's more based on the OC's of mine as both would go to the same direction just with different OC's. So I could tell you another fact about Jacke that you can put in to the story that could help you for now or another OC of mine that could help. Just tell me if you want to hear one or both ideas and I'm going to make a book about it so it's easier to explain since I can put pictures in it.
So let me know and don't hesitate to ask for ideas, I maybe just need more time to answer because I'm analysing your story to make a detailed idea. ( ͡°з ͡°)
Have a great night/day (✿❛◡❛)