Gregor is a mercenary who wanders between nations. It is revealed in his support with Lon'qu that he once competed with Basilio to become the West-Khan of Ferox, but lost against him. Gregor's support with Tharja reveals that "Gregor" was not his birth name, but it was the name of his brother, who was kidnapped and killed by bandits. He blamed himself for his death and took on his brother's name as a tribute to his memory. Tharja then summons Gregor's brother's spirit, who reassures Gregor that his death was not his fault. In his support conversations with Cherche, Gregor explains that, on a past job in Wyvern Valley, he betrayed his companions to save a younger Minerva—Cherche's wyvern—after said companions killed Minerva's mother.