Biggs and Wedge are first encountered when Noctis and his companions travel to Vesperpool in search of Mythril. When Aranea joins Noctis's group, she leaves the two of them in charge of their encampment. During conversations with Noctis's party, Aranea will state that, while she doesn't exactly consider the duo to be friends, she trusts them completely.
They are not seen again until much later, when Noctis and his group arrive in Tenebrae, once again alongside Aranea. As Noctis's party needs someone to operate the train taking them to Niflheim's capital of Gralea, Aranea assigns Biggs and Wedge to the task. Along the way, they converse with Noctis's party via the trains intercom, until the train is attacked and disabled by Daemons. They then tell Noctis not to worry and escape without them. Afterwards, Noctis's group state their hope that the two of them made it out alive.
Ten years later, when Noctis emerges from the Crystal, he is informed by Talcott that Biggs and Wedge did, in fact, survive the attack on the train. Alongside Aranea, they have become leaders among those protecting the people from the Daemons, and each now leads a unit of hunters.