Not enough Elder Scrolls fanart on this site!
Tharlennis, pictured above, is my Morrowind character. She's a Dark Elf (in Elder Scrolls land, that's Dunmer, not Drow!) and, at first glance, is a typical member of Great House Telvanni - self-interested, highly magical, questionably moral, slow to make friends, vain, and somewhat covetous. In reality, though, she is secretly a member of the Twin Lamps - undoubtedly unusual for the leader of the second-largest slaveholding house in Morrowind. She fought her way to the top of Great House Telvanni through deceit and treachery, culminating in the murder of Archmagister Gothren. Tharlennis feels entitled to almost anything that isn't nailed down, and makes heavy use of teleportation, telekinesis, and high-powered Chameleon spells to 'liberate' what she wants. It is this attitude that ties her to the Twin Lamps, since slaves are property: freeing them is akin to the theft of inanimate property, though any slaves Tharlennis frees are released, not kept. Freeing them rather than keeping them also ties to her attitude toward property, as it is pretty much the same as that of a Khajiit, one of the slave races. On top of all that, Tharlennis is a treasure hunter and an excellent interior decorator, and has transformed the interior of her stronghold, Tel Uvirith, into one of the most beautiful of all Telvanni 'buildings.'
For those who play, she does wear that dress in-game, and I made it myself. Well, the texture - I used NioLiv's mesh.
Edit: Got curious about that title; I've never been sure if it's really correct so I looked up the feminine form of "magister..." turns out I should be calling Tharlennis "Archmagistra," not "Archmagistress." I need to get better at doing the research.