I have some opinions.
I don't really like the idea of elements. Are they going to be important in the story, or just the cause of color scheme and homeland? For example, in G1, most of the Barraki obviously are elementless. Takadox is no water being, Pridak is not ice, Kalmah is not fire, and Mantax is not earth. I could see Carapar being stone, but Ehlek would not be air, and instead lightning. If you are going to be using these elements, I would suggest making Ehlek use lightning, though being from Kanae.
Is Ehlek responsible for his parents' deaths? Also, Ehlek does not sound like that bad of a ruler, he fortified one of the least fortified regions. I don't know why Lesovikk would take him down. That is, unless he poisoned his family, and was unwilling to step down. (upon further inspection, I've realized that Ehlek killing his family was implied, but it is never flat-out said.
So, I like Pridak's story, but if he was overthrown by his own sister, wouldn't she become queen? (This is more of a need of clarification than an opinion).
Why does Takadox hate Pridak? Is it because Pridak sees Takadox's one eye as not attractive and beautiful, so he roasts on him daily?
Way to bring in those 08' references! Just wait until Gorast becomes Ehlek's wife, or Gavla becomes Takadox's daughter.
I'm not really sure about Nocturn. I like Mantax, Carapar, and Kalmah, but I feel the Lightning Tribe is different. Here, the Lightning Tribe would be a secret, wouldn't it? I'm actually not sure. I just feel Nocturn should not really be a Barraki, and more of a pet of the rest. Just an idea, however.