Citizen of fire

On the harsh and fiery world in the solar system (home to Tarakin) the citizens enjoy life there, they often jump and splash in a nearby lava pool, (they are immune to lava and burns) train to become warriors, and hike up volcanos and tumble happily when they erupt. Most fire citizen's also seek advice from their "grandfather" about life and how to's to become a warrior in the future but in that future the elder of fire has predicted that the brother of earth, Korran would launch invasions on all the planets. In pic 2 a fire citizen is getting advice from their "grandfather" and in pic 4 is a battle pic in their distant future.