In the adventure, he starts off as a spoiled noble known as Bakaris the Younger. He is something of an annoyance for the PCs early on, but partway through the adventure, he defects and joins the Dragon Armies. The PCs have the chance to face him in battle later on, where he uses the Dragon Army officer stats, and they can even defeat him. Presumably if the PCs kill him, then someone resurrects him so he can still fulfill his role as Kitiara's 2ic later in the war.
EDIT: It is also established that Bakaris and his father originally came from Estwilde, which is in keeping with the established lore from previous editions.