These two-headed, 2.5 meter (8') tall, humanoid mutants that have green hair, blue skin, and four arms... each 2 under the control of a separate brain. They are all telepathic, with telekinesis, and will force available in both brains. Some 25% of them also have 2 random mutations (one on each side), which usually include poison claws (random intensity) on two hands, and a mental mutation, de-evolution, on the other side. Orlens will barter peacefully to obtain technological devices, and have made many of their own - specially adapted for use with four arms.
Orlens are the exception which disproves 'two heads are better than one', as often it is easy to spark an argument between the heads, causing them to bicker and be generally ineffective.