A Jedi Master from the time of the Sith Wars, very little is known about her.  While she is blind, her Force powers are such that she can visualize things in her mind, enabling her to see even through solid walls.  While records are inconsistent with one another, one records her as killing the Sith Lord Darth Nihilus while he is aboard his flagship of the Sith fleet, which has put down most resistance throughout the galaxy.  With the leader dead, it is assumed that the remaining Sith fight among each other and the Republic comes back again, to last until the Empire under Darth Sidious rules the galaxy.