Sia Norrin was a Twi'lek female Corellian mechanic who served the Galactic Republic during the Galactic War. In 3641 BBY, during the Corellia's war against the Empire, Kapp Zyman detonated bombs on the rocket tram's green line that found a route into Coronet City. However, Sia and a group of mechanics were able to repair a second line that had been damaged during an Imperial attack, allowing the Republic forces an alternate route into Axial Park.