Lowen was born to peasants in a poor village on the outskirts of Pherae. Although the village was far from the castle and had little worth saving, the knights protected the villagers from bandits. Inspired by their valor, Lowen aspired to become a knight himself, and traveled to the castle to begin his training as a squire. His father also became the chef for Eliwood's grandfather, the previous marquess of Pherae, until he threw out his back, and cooked for Eliwood's father Elbert later on.
Even though Lowen was a soldier, he followed in his father's footsteps and made sure that Eliwood was fed well up until he was chosen to go with Marcus on a journey to find Eliwood's father. While moving ahead to recruit able-bodied men in a nearby village to aid in Eliwood's expedition, he encountered pillaging bandits and subsequently rescued the archerRebecca as well as the Tactician to enlist their help in protecting the villagers. Once the village was saved, Lowen continued his service to Eliwood by fighting for him under Marcus's command, which eventually resulted in fighting the Black Fang and Nergal, and then returned to Pherae afterward to become decorated for his accomplishments and continue his knightly career.
If Lowen reached an A support with Rebecca during the game's events, they will be married in their ending, and he will beget a green-haired son who is said to have inherited his father's chivalrous temperament and his mother's skill at archery.