From Ardrana

Djinn are proud, sensuous genies from the Elemental Plane of Air. (Djinn is plural; djinni is singular.) While an adventurer may encounter these creatures in great number on their home plane, djinn tend to be solitary when visiting Ardrana. They favor the uncluttered vistas of the open desert to densely populated regions. Djinn are somewhat friendly toward mortals, however, and as a result, they may visit cities.

Djinn look like exceedingly tall, well-muscled men and women. Their features are noble and attractive. Their skin color ranges from pale blue to the more common olive-brown and dark tan of desert natives. Their eyes are usually brown, but there are also blue-eyed djinn. Djinn dress in airy, shimmering silks, which are designed for comfort as well as to flaunt their musculature.

Like most genies, djinn have a limited form of telepathy, which enables them to converse with any being of low intelligence or better. (This can make djinn valuable translators. Let negotiators beware, however: capricious djinn may relay their own "interpretations.") Djinn also speak the common tongue, as well as the language shared by all geniekind. The djinn dialect of the latter is sibilant and melodious, like a breeze passing through an orchard.

Note: Djinn originally appeared in this form in the Al-Qadim: Land of Fate for the AD&D game from TSR. Their use here is for the purposes of providing context for the campaign only.