Trevayne belonged to the family of Vilia Calimondra, who was a Sith Lord. In the year 1032 BBY, Calimondra's grandson, Odion, took possession of the Helm of Ieldis, a potent Sith artifact. His intention was to utilize it to destroy his Sith Lord adversaries. Calimondra, endeavoring to thwart him, instructed Trevayne, along with the rest of her kin, to send troops to Vanahame, a moon where Odion was harnessing the despair of youngsters to fuel his relic.