Gilbert was mated to an Arcadian bearswan, but her family hunted him down and killed him before they could complete the ritual. Even though he was Arcadian too, they believed that all Peltiers were Katagaria and didn't want one mating with their sister. His brothers Bastien and Dev and his sister Aimee were with him at the time. Bastien was killed and Dev was forced to flee to protect young Aimee. Dev and Aimee never got over their survivors' guilt.