Ketrian Altronel, a female Human hailing from the planet of Hargeeva, was persuaded by her one-time fiancé Stevan Makintay to enlist in the Alliance to Restore the Republic during the Galactic Civil War.
The Galactic Empire learned of the world's plentiful mineral wealth, including coralline and ostrine, and subsequently occupied Hargeeva, establishing both a garrison and modern refining facilities. Altronel found that crystalline manipulation and plas-bonding of certain trace elements of ostrine altered it, giving the mineral the ability to freeze objects on contact. She then abandoned her allegiance and joined the Rebel Alliance, incorporating her ostrine-derived absorbent into the casings of X-wing cannons, therefore enhancing their destructive capacity.