Nithe:
  While diud’chi are non-aggressive and strange, nithe can be very aggressive and are still strange. Most of the mystery comes from the nithe habit of keeping everyone in the dark, and the use of their incredible technology. 

  The first and foremost thing the game master must keep in mind when running a nithe encounter is that, in all likelihood, the nithe has absolutely zero interest in the player characters. It wants to know the location of something, or if they’ve ever encountered something. It isn’t interested in fighting or wasting its time demonstrating how awesome it is to some insignificant living things. It has bigger fish to fry. If the players are rude, a simple smack by a nithe is usually enough to get its point across to any idiot who’s too stupid to keep his mouth shut. A nithe can kill you with a fraction of its strength. It knows this, it has nothing to prove. Intelligent humans leave nithe the hell alone.

   There are a couple of different kinds of nithe, but the type most often encountered is about six feet, nine inches tall, weighs around three hundred pounds, and has a very female humanoid appearance. It is capable of pulling the door off a car. Its very skin is armored, providing a protection of 3d10 to its entire body. It has a full range of sensors both active and passive. It can see perfectly in the dark. It can see radiation emissions and can track radio signals. A nithe has talons capable of puncturing 1/8th inch sheet metal with little difficulty. It does permanent damage in melee combat.

In addition, the nithe have access to the largest, most up to date computer database in the galaxy. It has full access to this information at all times, allowing it to know whatever the game master thinks it should know. It might know what the characters ate for breakfast this morning, especially if they ordered it via computer. Adding to their overall mystique, a nithe never reveals all it knows, and it never admits that it doesn’t know something, unless such an admission would serve a greater purpose.

As machines, nithe are perfectly capable of existing forever. Indeed, the longest lived of them has been around for 2.6 billion years. Some of these nithe know things no human should ever come to know, and they make sure it stays that way.

For a nithe, power is everything. Nithe versions of power would boggle a living creature’s mind. Being the absolute ruler of all of human space is as nothing when compared to the nithe control over the galaxy itself and they are working to extend this control to other galaxies as well. The extent to which they’ve been successful is known only to the nithe themselves and they don’t see any reason to tell anyone else.

A nithe should always be played with a calm, cold demeanor. They all have a regal flare. And defensive shields.

Yes, nithe have defensive shields. This is another reason why they aren’t terribly impressed by lesser creatures. Without adding a whole bunch of rules and adding half of the nithe race module to this section of the base rulebook, it should suffice to say that a nithe’s shields take no damage from physical blows of any kind. If you want, you can say that its shields take 5% damage from any energy weapon that hits. Once a nithe’s shield are down to 20%, it’ll leave via transporter. As a nithe is easily capable of killing you, however, it is highly unlikely that you could live long enough to drop its shields to 20%.

The actual rules involving nithe shields, their strengths, their replenishment, and the effects of different weapons upon them are covered in detail elsewhere. This is just in case a player is dumb enough to shoot at one. Just remember, a slug thrower like a pistol or a rifle inflicts a physical blow, and thus has no effect upon its shields, at least not enough to keep track of during a simple encounter.

A nithe won’t even react if a weapon is pulled on it. In such a case, it calmly figures out who it’s going to kill first as soon as the shooting starts and what level of response it should use. Then it assigns target values to everyone else in the immediate area. A nithe almost never shoots first. In this way it can claim that it was simply defending itself from aggression.

I hope you’re getting the picture. Nithe should not be used lightly. They have no sense of humor. Their sense of fairness, as well as any concept of mercy, was removed from their higher programming functions as taking up too much hard drive space. Never overplay a nithe encounter. It should walk up, ask a question or two, receive an answer or two, and then leave, completely ignoring the characters from that point no matter what they do.

A nithe can have any skill you want it to have at any level, no problem.

A nithe doesn’t have a Courage Die rating. It can’t be suppressed. It takes cover when it wants to.

A nithe can only be killed if its Chest hit location is zeroed out, not its head. A nithe’s “brain” or main processor is in its chest. On top of this, nithe don’t bleed, so there is no damage progression over time as there is in living things. Nithe damage control subsystems prevent them from feeling any real pain, so they don’t need to make any activity rolls when injured, either. Also, as a nithe is entirely synthetic in construction, it doesn’t breathe and can thus be immersed in liquid or exposed to hard vacuum for an indefinite period with no ill effects.

Killing a nithe is damned-near impossible if you don’t know what you’re doing.

The Technological Classification of the Nithe Dynasty is “F”, and everybody knows it.