Tribe
From MHWiki
The Tribal Isles are home to three tribes of mice: Elub, Nerg, and Derr. The mice within each tribe are of the same power type, wear color-coordinated clothes, prefer a particular cheese, and perform specific parallel tasks or serve a specific function.
Of the three tribes, the Elub mice are worth the most points, the Derr mice provide the most gold rewards, and the Nerg are balanced.
According to the story line, the tribes used to be ruled by Balack.