Gran could easily be identified by their three eyes and their goat-like snout. Female Gran also had three breasts. Gran were also able to sense one another's emotions and disposition by noting subtle changes in body heat and skin color. The Gran had excellent vision, able to resolve more colors than most species, and even able to see into the infrared. Gran had two stomachs, having evolved from herbivorous grazing animals who lived in herds on the mountains and highlands of Kinyen, surviving on the local goatgrass, for which Gran kept their taste. Gran chewed and digested their food quite slowly, savoring the flavor carefully. A single meal could take almost an entire day to finish, but a Gran would often not need to eat for several days afterwards.

A recessive genetic mutation sometimes caused some Gran to suffer from misshapen extremities, with hands and feet swelling to abnormal sizes. While not affecting the individual's ability to do finer work, the handicap nonetheless often resulted in social isolation. Gran scientists intently studied the trait to attempt to find a cure.

The peaceful nature of Gran society was a reflection of their homeworld, Kinyen. Kinyen boasted large and rolling grasslands and highlands, a dense and beautiful forest, and one of the longest and clearest rivers in the Bes Ber Bikade sector. The beauty of this planet, and the need for primitive Gran to band together for defense against predatory animals, helped the Gran develop strong bonds of home and family in their society (once they became a civilized species, the Grans set aside fenced nature preserves for the carnivores which once threatened them). Grans also mated for life, forming such strong bonds that they generally died within days of a mate's death. It was rare for any Gran to leave their planet of origin once they had taken a mate.