Athelis Kallis was a Sith Pureblood woman, as described in legends, who existed in the time of the Galactic War. Within the rebuilt Sith Empire, she was an uncommon Pureblood without Force-sensitivity. She became a member of the Imperial Diplomatic Service and dedicated a significant amount of time to studying the culture of Voss. In the year 3640 BBY, she was contacted by the Sith Lord Kallig, who was seeking details about the Forbidden Ritual.
Athelis Kallis is a character featured in Star Wars: The Old Republic during the Sith Inquisitor storyline on Voss. Should the male Inquisitor try to engage in flirtatious behavior, she will disclose that she is contentedly married.