Each craftworld carries the seeds of Eldar culture. Not all are identical by any means, as each reflects the cultural heritage of its long dead world of origin. Biel-Tan is renowned for the strong warrior ideals of its people. For the Eldar of Biel-Tan the Way of the Warrior, the life-stage that encompasses the Aspect Warriors, is considered the first step upon the Path of the Eldar. Upon reaching physical maturity a Biel-Tan Eldar becomes an Aspect Warrior, and only once he has fulfilled this role can he continue along the Path of the Eldar.

The Eldar of Biel-Tan have a strong honour code and believe that the best way to die is in battle fighting the enemies of Biel-Tan. In the centre of the craftworld there is a special Chamber of Heroes where the spirit stones of dead Aspect Warriors are placed. When the Runeseers have to make a particularly difficult decision about the future of their craftworld they retire to the Chamber of Heroes to consult with the warrior dead. The dead of particular battles are arranged together and are often referred to by the name of the battle in which they fell - for example the Dead of Corrus fell fighting Chaos on an ancient Eldar colony.

The symbol of Biel-Tan is the Eldar rune of rebirth and its name actually means the 'Rebirth of Ancient Days'. Biel-Tan Guardians wear white or grey uniforms with details in green. Vehicles are often coloured entirely green, with large areas broken up using a pattern of twisting thorns in a contrasting shade.