Koolians resemble short, powerful, bipedal bears. They are used to higher gravity, so their strength is considerable, and they have to be careful around other races. To a Koolian, everything is fragile. Although they are usually very gentle, the Koolians' temper is legendary.

Because of their temper and their occasional clumsiness, Koolians make poor diplomats. However, they can be quite imposing as a fighting force. Koolians often fight to the death if they have cause.

Koolian ships are built for their high gravity. Koolians have a legendary tolerance for higher gravity, and seek out worlds with high gravity to colonize.