A brilliant scientist, Galen Erso was coerced into using kyber crystals to enhance energy yields – work his friend Orson Krennic then weaponized to create the Death Star’s superlaser. Galen fled to remote Lah’mu with his family, but Krennic tracked him down and forced him to resume his work. Trapped, Galen seeks to build a fatal flaw into the Death Star and reveal it to the Alliance.
A battered veteran of the Clone Wars as well as the ongoing rebellion against the Empire, Saw Gerrera leads a band of Rebel extremists. Saw has lost much in his decades of combat, but occasional flashes of the charismatic and caring man he once was shine through his calloused exterior. Gerrera is bunkered on the ancient world of Jedha, coordinating a prolonged insurgency against the Imperial occupation. Saw’s ailing health has not withered his resolve to fight.
As the Ersos fled Coruscant, a small fragment of kyber crystal from Galen’s research caught Lyra’s eye. Hoping it brought good luck, she took it to Lah’mu and made it into a pendant. As the Empire closed in, Lyra gave the pendant to Jyn, reminding her to trust in the Force. Jyn has kept it during her travels as a link to her lost family.