The Kin are not native to Andrus. Not long after the fall of the Naga Imperium their ancestors arrived through elemental breaches and quickly settled in areas most hospitable to their connections. They refer to themselves as Fae while the rest of the world call them Kin.
* Heritage Composer, Pg 49
Due to the constant exposure to the energies of the elemental planes, the Fae developed an affinity for their respective elements. This is reflected in their Elemental Heritage Trait.