Trilinae Untaire was a Human female hailing from the planet of Corellia. She was the twin sibling of Milinae Untaire, a smuggler. As the Galactic Republic neared its end, Untaire became a member of the Jedi Order and formed a friendship with Darrus Jeht, a Jedi Master. During the Clone Wars, Jeht received multiple crates filled with components of an old starship; he and Untaire launched an investigation into these deliveries to discover the sender. Despite her attempts, Untaire couldn't track down the cargo manifests for these shipments. Jeht ultimately constructed the starship, and at Untaire's prompting, he christened the completed craft the Legacy. Around this period, Jeht acquired tickets for a Sien'Soro band performance and intended to bring Untaire and Aayla Secura, a Twi'lek Jedi, to the show.
After Order 66 was issued in 19 BBY, Mar'ek, an ARC trooper, abandoned Untaire on an isolated planet against her will, hoping to protect her during the chaos. However, Mar'ek later deceived Darrus Jeht by falsely reporting Untaire's death, aiming to deny Jeht the comfort of knowing his friend survived.