Sparker

Those blessed with the Kenning of Fire who can stoke and spread flames. The full extent or limitations or their powers (such as if they can create flame, though it is likely due to the continuous use of lavaborn throughout the story when referring to this occurring) isn't made clear in A Plague of Giants. However, there is also heavy implication that their powers can be used a bit more utilitarianly, such cooking and creating flame-based magic items (e.g. "a firestone").