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 geologist with an extensive knowledge of crystals, Lyra Erso helped her husband Galen with his work before he became involved with Orson Krennic’s energy-enrichment project. Deeply suspicious of both Krennic and the Empire, Lyra believed in the Force and tried to share her faith with her daughter Jyn. When Krennic tracks the Ersos to Lah’mu, she risks everything to protect her family.
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.