How very Blue of you. 

But anyway, yes, while I will not write your motivation for you, I plan to use any feedback I get to help flesh things out before actually launching the game. This includes giving hooks for why characters might be interested.

EDIT: And I am willing to directly work with you to fit your motivation into the party (for an initial suggestion: I am going to be honest, there will be more to the Frascan general responsible for the Arussian King's death. Perhaps you are searching for someone who's tactics match his?).