Professor Ley'Arsha was a Humanfemale dispatched to the planetAthiss as part of a Republic survey team. She led the excavation of the Sith ruins of Vodal Kressh. At some point during this process she was corrupted by the spirit of Vodal Kressh and converted into one of his followers.
In 3643 BBY a strike team was sent to the Athiss ruins. Ley'Arsha confronted the strike team but was killed.