Elementals are the corporeal incarnations of the elements that make up the physical universe: air, earth, fire, and water. Though little more than animated energy on their home planes, they can be called on by spellcasters and powerful beings to take shapes and perform tasks.
As described in the fifth edition Monster Manual, an air elemental is a funneling cloud of whirling air with a vague semblance of a face. Although it likes to race across the ground, picking up dust and debris as it goes, it can also fly and attack from above. From their earlier appearance in the game, air elementals could be summoned in open areas where gusts of wind were present; like their earthen cousins, while they rarely spoke, the air elementals’ language could be heard in the high-pitched shriek of a tornado or the low moan of a midnight storm.