Lasan Eilentes is the older sister of Euryce Eilentes. Her twin brother is Brex Eilentes. She currently resides with her parents, Maishan and Westry, at their home in the town of Villium on Kementhast Prime.
Although she was quiet and reserved as a child, Lasan acted as a guide for the younger Euryce in many aspects of her life, gave her advice, and frequently softened the torments to which Brex occasionally subjected Euryce (→TRD flashback).
Feeling abandoned when Brex joined the Imperial Combine's MAGA forces, Lasan left Kementhast Prime to live with her partner Artho. She later regretted the decision, and confided as much in Euryce during a conversation they had about relationships (→TRD flashback).
Lasan later returned home to live with her parents, despite being an adult (→TRD).
Euryce Eilentes has been unable to contact her sister Lasan since returning from the Perseus arm (→FSS).