Duly noted. I didn't think that understanding how much backstory to put into my CS to logically bring it up to the point it starts in the RP was a spoiler. Hopefully, a setting question won't go amiss, then.

Are we looking specifically at the era of Raava, or are we assuming an AU where the spirits are less involved?
http://avatar.wikia.com/wiki/Era_of_Raava for reference.