The tall, muscular, Ssi-Ruuk are warm blooded creatures that are not indigenous to the SWURPC Galaxy. An adult Ssi-Ruuk can stand over 6 feet tall and can weigh close to 750 pounds. They are armed with huge, muscular tails and short well-muscled upper limbs with three clawed prehensile digits which are used as hands making a Ssi-Ruuk a formidable creature. They have long beak-like muzzles which contain sharp teeth. Their sensitive eyes rely on triple eyelids to help them quickly adjust to changes in light. However, they do not rely on vision, much as humans do. Rather they rely on their nose tongues. These nose tongues are capable of detecting changes in emotions making it hard to deceive a Ssi-Ruuk once he is familiar with the "scent" of a being.

The Ssi-Ruuvi language is a series of honks, whistles and throat clicks. Several of the higher pitches in the Ssi-Ruuvi vocabulary are above the human hearing range.

Instead of wearing clothing they wear bandoleers which carry their tools, weapons, and other equipment (they find the idea of covering the body humorous). They are covered with a thick scaly hide. The hide is so thick that it is known to withstand a blaster bolts and only having minor burns marks to show for it.

The Skin of a Ssi-Ruuk is a representation of his political standing. One color dominates each Ssi-Ruuk's body and it is forbidden to mate with a different colored Ssi-Ruuk.