 Their women have long pendulous breasts reaching as far as their waistline.Their latent metapsychic abilities, once brought to operancy by the Torcs, are on average stronger and display a wider range of abilities than the operant abilities of the Firvulag; however, the Firvulag outnumber the Tanu considerably, which for a long while meant that there was a balance between the two races.In the forty years before the start of the first book in the series, however, the Tanu have claimed ascendancy.