They are very dexterous. They are naturally dishonest. They have no country of their own, but work for other races. They tend to be mistrusted by others. They despise politeness as a kind of falsehood. They are quite short compared to the other species, they have big feet but small hands and tend to be good at camouflage.
In their early days of discovery, the Jissak found the Iskir home planet Tlalok and have destroyed nearly their entire species.