Settlements that find themselves near the hilly homes of Thriae hives often send a chosen citizen to visit the creatures, hoping to glean helpful insight from the wise prophetesses regarding the growth of the settlement's crops, the prosperity of its people, or the Strength of its warriors. Thriae have little interest in the affairs of most humanoids, but do aid those who come bearing offerings of gold or physically fit male consorts. All Thriae are female, and so the queen must breed with Humanoid males in order to propagate the colony. If a colony hasn't received an offering of a suitable consort recently, Thriae sometimes visit nearby settlements in the hope of garnering young male volunteers to come and live with them for the rest of their lives—living with the Thriae exposes chosen males to many of the mysterious race's secrets, so the prophetesses cannot afford to let them leave the thriae's Domains once they have entered. The life of male consorts is one of comfort and luxury, however, as they spend their days in a blissful trance brought on by the mind-altering effects of the Thriae queen's nourishing honey, a substance called merope. Once they are too old to continue their duties, the males are put in a deep, numbing sleep, whereupon the Thriae painlessly devour the consorts' elderly bodies. Thriae generally do not have emotional ties to their Humanoid mates, using them for procreation only—exceptions exist, particularly among non-queen Thriae, who cannot lay eggs but sometimes choose a willing mate anyway. Only the queen can lay eggs; a typical queen produce 400 to 500 eggs in her lifetime. The life span of a typical Thriae who does not die in battle is about 200 years.

Thriae choose particularly spiritual individuals to become seers, members of the colony who Perform the rituals that allow them to divine their cryptic prophecies. These seers drink from merope and derive meaning from their spiritual hallucinations, traveling into the forests or mountains to decode various patterns among nature. Thriae hold a particular reverence for the structures and communication patterns of common bees, patterns which they often study intently while undergoing their merope-induced spiritual journeys. The bond Thriae have with common bees and giant bees extends beyond this, however, as many powerful Thriae possess the ability to call forth such insects when they are in need of aid, such as while protecting their homes. Thriae are extremely territorial, and disrupt their normally stoic behavior to passionately fight off intruders or creatures otherwise imposing upon their domain. Many Thriae colonies can trace back their lineages thousands of years, keeping extensive archives hidden within the catacombs of their labyrinthine hives. The hives Thriae reside in resemble the beehives of their miniature relatives, but constructed on a much grander fashion and scale. Since Thriae fly wherever they go, they tend to build their most important chambers higher up in order to deter bipedal would-be burglars.

Thriae come in various shapes and sizes, their abilities ranging equally in terms of specialization. An individual thriae's occupation within the particular Thriae society she is born into is selected by her elders when she reaches adolescence, several months after her development as a larva and then as a pupa. Once her occupation is determined, a young Thriae is assigned a “mother,” and is trained by this elder to Perform her tasks perfectly so as to keep the hive in fully autonomous order. Many Thriae never see battle in their lifetimes, instead performing tasks such as recording scriptures derived from seers' verbal prophecies, cultivating the crops and herd animals that Thriae use for food, or crafting elaborate crowns, necklaces, and other ornaments unique to Thriae and renowned by jewelers the world over. Thriae have a fascination with all kinds of rare metals, and the intricate ways in which they utilize these alloys in building their wares exemplifies the race's passion and ingenuity. They do not regularly trade with outside societies except in times of dire need, such as during a feud or war that cuts off access to needed resources.