The marriage ceremony uniting Lyra and Galen Erso occurred on the planet of Coruscant during the year 25 BBY.
Galen Walton Erso, a scientist who was a male human, dedicated his research to the study of crystals and their potential for energy provision. Erso's particular interest lay in Kyber Crystals, the power source for the iconic weapon of the Jedi Knights and Sith, known as the lightsaber. Due to the scarcity of these crystals within the Galaxy, Erso led a field team to the planet Espinar in hopes of discovering rare crystal deposits, especially Kyber crystals. During this six month expedition to Espinar, Erso's life took an unexpected turn when he fell in love with their guide, Lyra. Although the field team did not discover anything similar to Kyber Crystals, Lyra and Galen departed the planet together.
One year later, the couple exchanged vows on Coruscant. Nari Sable, a friend of Lyra's, served as her maid of honor. Reeva Demesne, a colleague of the couple, was also present at the wedding as a guest.