Visas Marr was a Miraluka female from the Mid Rim world of Katarr who lived during the time of the Jedi Civil War and the period of unrest that followed in its wake. In 3,952 BBY, Katarr had been chosen to host a secret Jedi conclave, which consequently drew the attention of the Sith. Darth Nihilus, one of the leaders of the Sith Triumvirate, brought devastation to the world, as well as the Jedi Order. He consumed all organic life on the planet, yet left Marr alive, albeit with damaged vision. She was taken aboard his flagship, the Ravager, and after she was made his apprentice, a Force bond was forged between the two. Afterward a servant of the dark side of the Force, she traveled with Nihilus beyond the Outer Rim. In 3,951 BBY, Marr was dispatched into the galaxy to seek out a growing presence in the Force and bring its cause before Nihilus.
Marr found the center of the phenomenon she sought: a former Jedi, exiled by the Order before Nihilus's rise to power, who had returned to known space. She ambushed and challenged the exiled Jedi, who defeated Marr. Impressed by the Exile's abilities and the destiny that she perceived about her, Marr allowed herself to be swayed to the light. Forsaking her master, Nihilus, she became an informal apprentice to the Exile, teaching the elder ex-Jedi about the power of her Force-sensitive species. The Miraluka traveled with the Exile and aided in her endeavor to save the Jedi Order by locating those Jedi Masters who had been absent from the convocation. Later that year, Marr played an instrumental part in resolving the Battle of Telos IV, in which she met her former master in battle, and triumphed. In the process, she overcame the remaining shadows of her past, coming to terms with the destruction of her people. Soon afterward, the Exile confronted and defeated the two surviving members of the Triumvirate, Darth Traya and Darth Sion, at Malachor V, ending the Sith's program to eradicate the Jedi. Shortly before her death at the hands of the Exile, Darth Traya prophesied of Marr's return to Katarr and her pivotal role in rebuilding the Jedi Order.