Ahh, kind of like a computer? I'm afraid I haven't had much experience with technology. All "technological advancements" from where I hailed were controlled by bending and not a separate, individual power source. It's all...new to me.
My home doesn't have a King or Queen. We have the Fire Lord and Fire Lady. The Earth Kingdom does, though. Each of the four nations do things differently. Sort of like how you have your president and not a monarch. At least, I think he's not a monarch. I haven't paid much attention to your global-happenings, though. There's enough going on here in LA as it is.
I can control fire that isn't mine, it just takes a bit more concentration and in the long run is just easier to create your own, for you know how your own fire moves. The fire of others or other sources is wild an unpredictable. You have to pay closer attention to it.
Vampires are real. I work with one--he's got a soul, though, so he's not out to eat everyone. It's...complicated.