The weapon is first seen when Commander Kaoru Mizusaki draws her sidearm against Princess Asseylum Vers Allusia before she reveals her true identity while attempting to activate the Deucalion's Aldnoah Drive. (AZ: "Then and Now")
Then when Rayet Areash steals Captain Darzana Magbaredge's sidearm, and attempts to use it to kill Princess Asseylum. After hearing Princess Asseylum blame herself, Rayet states, "What am I even doing?" before attempting suicide, but is swiftly disarmed by Inaho Kaizuka. (AZ: "Before the War")
Several U.E. soldiers are seen using Glocks in the assault on Castle Saazbaum. Inaho draws his Glock and attempts to shoot Slaine Troyard before he shoots him, but is instead shot first. (AZ: "Childhood's End")
Throughout Episode 10 the Glock that is in Rayet's hand seems to switch between the compact and long variant for the Glock.