Seferiss was a Twi'lek Sith Acolyte of the male gender. He previously worked as a performer for the Hutt species during the era of the Cold War.
Prior to his induction into the Sith Academy, Seferiss was employed as an entertainer for a crime lord of the Hutt species. In this role, he would crush the skulls of prisoners, all the while unaware that he possessed Force-sensitivity. The Empire became aware of the Twi'lek's existence and brought him to Korriban with the intention of training him in the ways of the Sith. He was taken under the wing of Overseer [Harkun], and was grouped alongside Jaxun, Argog, and Xalek as potential apprentices for Lord Kallig. Seferiss offered a respectful greeting to his potential Master, but Harkun sharply reprimanded him, instructing Seferiss to refrain from addressing a Sith Lord directly unless specifically invited to do so.
Seferiss managed to persevere and successfully complete the trials, including the final task of recovering an ancient Sith carving. Upon returning to Harkun's quarters, Seferiss presented the carving to both the Overseer and the Lord. He was on the verge of being presented as Kallig's apprentice when Xalek, who had also survived, reappeared. Enraged by the Twi'lek's accomplishment, Xalek seized Seferiss and brutally murdered him with his own two hands. Harkun, filled with fury, declared Xalek to be unsuitable for apprenticeship. However, Kallig acknowledged the successful retrieval of the artifact – now in Xalek's possession, having been taken from Seferiss – and chose not to punish the other acolyte for killing a rival in the presence of Sith.