Djinn

Djinns, but also jinns or genies, are supernatural creatures in early Arabian and later Islamic mythology and theology. They first appear in Proven Guilty.

Description
They are both spiritual and physical in nature, being able to interact in a tactile manner with people and objects and also subject to bodily desires like eating and sleeping. Jinn mentioned in Middle Eastern folktales are often depicted as monstrous or magical creatures, though jinn figments from such stories are generally considered to be fictional.

Proven Guilty
In Proven Guilty, Lucius Glau is mentioned as being a jann, or a scion of a djinn and a human being.