Ketrian Altronel was a Human female from the planet Hargeeva who joined the Alliance to Restore the Republic, convinced by her former fiancée Stevan Makintay to join, during the Galactic Civil War.


When the planet's rich mineral deposits, including coralline and ostrine, were discovered by the Galactic Empire, they subjugated the world, installing a garrison and advanced refineries. Ketrian Altronel discovered that crystalline manipulation and plas-bonding of certain trace elements of ostrine modified it, resulting in the mineral being able to instantly freeze objects that came in contact with it. She defected to the Rebel Alliance and added her ostrine-derived absorbent to the housings of X-wing cannons, improving their firepower.