The Viska have long necks, topped by a triangular head. Their eyes are placed back on the skull, so they have a complete arc vision, including directly behind them. They derive nearly all of their sustenance from the blood of other living creatures due to a very primitive digestive tract. The circular mouth houses a proboscis called a blossug. It is about 40 centimeters long, with several layers of muscle, and a hollow bone with a jagged tip in the center. When a Viska feeds, it extends the blossug, cutting into the flesh of a creature. Through use of the muscles in the snout and a secondary group of muscles beneath the skull, the being withdraws blood from the unfortunate victim.

Individual Viska are controlled by their clan and a such, they constantly seek ways to increase their personal status and the status of their clan. Few Viska have ever attempted to leave their native society; those that did escape had to flee elite Viska warriors and hired bounty hunters. Viska society is known for its callous disrespect of the sanctity of life.

Viska live in clusters of repulsorlift-powered buildings. This tradition came from the need to stay away from the ground, or risk being caught in a volcanic eruption or earthquake. With the advent of modern technology, the Viska began building flying platforms, and have now adapted to a completely aerial society.