Ruby
Look, if it was anyone else, I'd be agreeing with you. This isn't just some gung ho attitude.
This is my world. Do you know how rare that is around here? A bone fide native? I'm sworn to protect this world, at all costs. That is what it means to be the Slayer. And I'm the only one at the moment.
So some demon bitch comes and threatens my people, it becomes my problem.