Aristrocrat of the Sphere of Garude, Lady Auriga is presumably a vampire and the one behind Veyati'sGhast pursuers. Auriga is the daughter of Lord Cain, who by proxy is also a vampire. Given his influence on the area of Garude, she is considered a similarily powerful figure of Garude, capable of exercising nearly any event desired.
Her use of ghostly assassins to get rid of an individual she hypothesized to be a trouble is a testament to her ruthlessness. It is unknown what her intentions are on Garude, though given the haste with which she attempted to dispatch Veyati, it is unlikely to be a noble one.