Genasi, Fire

Nearly all fire genasi are feverishly hot as if burning inside, an impression reinforced by flaming red, coal- black, or ash-gray skin tones. The more human-looking have fiery red hair that writhes under extreme emotion, while more exotic specimens sport actual flames dancing on their heads. Fire genasi voices might sound like crackling flames, and their eyes flare when angered. Some are accompanied by the faint scent of brimstone.  
"The following communities are known to the people of Myzelis and recorded in the Journals of Eblin. Realms not listed here have no known populations of these Aethrin large enough to list as communities in their own right."  
Inyddaska Anír, Master of Mentors
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Ancestries by Realm

Gylidder Fire Genasi

  Gylidder Genasi are descended from Inaethri who left Myzelis for the inner planes of Air, Earth, Fire, or Water long before the Mortal Era began. Their ancestors were infused with the essence of those planes and became elementals in their own right, summoned to the material plane for a medley of arcane reasons. Over time, the elementals' essence was transmuted into mortal bloodlines and the Genasi were the result. There is no single commune of elemental Gylidder Fire Genasi, but there are some families well known for their affinity for the element; the Banrin of the Sofren District (literally descended from the Inaethri Elisarion), the Shachar family of Walhamen, and the Burningheart tribe of Bumblebuck.  

Verberan Fire Genasi

  Emberborn Genasi: Some of those who are born on the island of Verbera have been influenced by the elements that make it up. These persons, the genasi, are usually associated with the elemental planes. It is unknown whether this is accurate, but what is obvious is that the genasi are as unusual as aasimar, tieflings, and kalashtar. Their skin can be cold and durable like stone or hot to the touch, and they possess certain magical capabilities that make their birthright clear.