Elios Maliss was a Sith trooper of the male Human race. He fought for the Sith Empire during the time of the Galactic War.
Elios found himself stationed on the planet of Taris in the year 3642 BBY. During this time, he crossed paths with the Sith Inquisitor known as Kallig, who was investigating a disruptive ghost plaguing Taris. Elios shared information with Kallig, revealing that the ghost haunted the Jedi Enclave and was linked to a Padawan named Ashara Zavros. Before meeting with Ashara, he assisted Kallig in locating holocron recordings of her to exploit her vulnerabilities. He then met with her and persuaded her to summon the ghost of her ancestor, Kalatosh Zavros. However, upon the ghost's arrival, Elios exposed his true allegiance, revealing that he had betrayed Kallig to Darth Thanaton, who rewarded him with the title of Lord in return for the ghost. His reign as a Lord was short-lived, as Kallig swiftly eliminated him for his act of betrayal.