Fin's Father was first seen commanding the troops to attack the wyverns, when they invaded Albion. Moments later, after the end of the battle, he was seen on the ground dying, yet glad his lad opponent was such formidable. A wyvern named Durandal asked him, why did he picked up the sword and wrecked havoc in his homeland. He gave his reasons, that Rome deprived his village of resources, so to survive he had to threw away his warrior's honor and joined Rome.
He then told Durandal to escape, since the 2nd battalion is coming soon and then asked for a favor, that if Durandal ever meets his son, Fin, to tell him that his father died with honor.