Twi'leks, occasionally referred to as Rylothians, were a tall near-human species whose most striking feature was a pair of long appendages protruding from their skulls, called lekku. They hailed from the planet of Ryloth, in the Outer Rim Territories, and female Twi'lek were often exported offworld as slaves.
Twi'leks were a species of tall humanoids whose skin spanned a vast array of colors, including white, orange, yellow, green, pink, blue, purple, black, and red. Their most distinctive feature was the pair of prehensile appendages that sprouted from the crown or base of their skulls, known as lekku, or headtails. Although Twi'leks normally had two lekku, some individuals had four. The species had two sexes, male and female. While males had ears with lobes resembling those of humans, females had cone-shaped hearing organs, found in the same place on the head. Although Twi'leks naturally had blunt teeth, males typically sharpened them to points.