Battle Droid Atherna

Battle Droid Atherna was an experimental assault battle droid constructed by the Eternal Empire of Zakuul. In 3632 BBY, it was deployed to protect an outpost of the Knights of Zakuul under attack by Havoc Squad, but was destroyed by Aric Jorgan and The Outlander

Behind the scenes
Battle Droid Atherna appears in Star Wars: The Old Republic: Knights of the Fallen Empire Chapter 11: Disavowed.