Ilona Selin was a human female from the Outer Rim Territories terrestrial planet of Anchoron. Wanting power, she joined the Galactic Empire. Since it needed more space station operators, Ilona was placed into Battle Station Operations. Ilona was originally stationed on the Adjucator, a Golan II Space Defense Spacegun, as an ensign. It was moved across the galaxy during the Galactic Civil War, and thus Ilona fought the Alliance to Restore the Republic multiple times. After the Battle of Endor, multiple senior officers of her branch were killed aboard the second Death Star. In the resulting power vacuum, Ilona rose up to captain of the Judicator, a Golan III Space Defense Novagun. She quickly was promoted to colonel and given a posting on Battle Station Command. There, Ilona argued many times with fellow members Sena Tavari and Titus Klev over multiple issues.
Ilona, with the Judicator, Adjucator, and Imperializor (another Golan II), was stationed over Bastion by Grand Admiral Thrawn while serving Thrawn's confederation. After his death, Ilona was made a Senior Colonel and her force was stationed over Byss by reborn Palpatine. Her force was moved to Vulpter shortly before the Emperor's final death on Onderon. Ilona later fought against the Yuuzhan Vong as a member of the Imperial Remnant, preventing them from taking Bengat. Later during the Yuuzhan Vong War, Ilona ignored a request for assistance from Sena, and got her killed. She ended up falling in love with her former husband, a surviving clone trooper and Brigadier General on Stormtrooper Command, Rothax.