Hmm. Well it's a big explanation, but it mostly has to do with clans.
In my comic I refer to Night Furies as Shadows, unless it is humans refering to them.
There are actually 3 main groups:
The Southern Shadows, Sea Shadows, and Northern Shadows. The South will be a regular warm climate, Sea: coast and underwater, north: snow, ice, and mountains.
The Rebels will show up later in my story. They do not support any side and they accept any fury, no matter what clan they come from.
Then there are the lower classes, which are clans such as the Forest Shadows.
Hope it's not too confusing ^^'
Choose any side, except for Sea, since they requite gills...and will be, well, gone soon.
For more of an explanation: the ones from the north are most probably the good guys, but they suffer alot!
the ones from the north are bad guys. Rebels are against humans while the north is against the south and vice-versa.
Ask me again if you are confused