Genasi

Those who think of other planes at all consider them remote, distant realms, but planar influence can be felt throughout the world. It sometimes manifests in beings who, through an accident of birth, carry the power of the planes in their blood. The genasi are one such people, usually the offspring of genies and mortals.
Occasionally, genasi result from exposure to a surge of elemental power, through phenomena such as an eruption from the Inner Planes or a planar convergence. Elemental energy saturates any creatures in the area and might alter their nature enough that their offspring with other mortals are born as genasi.
Genasi inherit something from both sides of their dual nature. They resemble humans but have unusual skin color (red, green, blue, or gray), and there is something odd about them. The elemental blood flowing through their veins manifests differently in each genasi, often as magical power.
Seen in silhouette, a genasi can usually pass for human. Those of earth or water descent tend to be heavier, while those of air or fire tend to be lighter. A given genasi might have some features reminiscent of the mortal parent (pointed ears from an elf, a stockier frame and thick hair from a dwarf, small hands and feet from a halfling, exceedingly large eyes from a gnome, and so on).
Genasi almost never have contact with their elemental parents. Genies seldom have interest in their mortal offspring, seeing them as accidents. Many feel nothing for their genasi children at all.
Some genasi live as outcasts, driven into exile for their unsettling appearance and strange magic, or assuming leadership of savage humanoids and weird cults in untamed lands. Others gain positions of great influence, especially where elemental beings are revered. A few genasi leave the Material Plane to find refuge in the households of their genie parents.
As rare beings, genasi might go their entire lives without encountering another one of their kind. There are no great genasi cities or empires. Genasi seldom have communities of their own and typically adopt the cultures and societies into which they are born. The more strange their appearance, the harder time they have. Many genasi lose themselves in teeming cities, where their distinctiveness hardly raises an eyebrow in places accustomed to a variety of different people.