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.