Valits live on the volcanic plains of Vulcan. This small rust-colored burrowing rodent has powerful claws capable of digging through the hardest soils or even volcanic rock. It lives in large family units in vast underground complexes and emerges onto the surface world only at night. The creatures are highly intelligent, and xenobiologists at the Vulcan Science Academy have recently begun experimenting with domesticating the creatures.

The name of the valit is also used to describe a computer program that is used to "burrow" past security interfaces and provide unauthorized access into a system's data core. (Last Unicorn RPG module: The Way of Kolinahr: The Vulcans)