In the anime Valkyria Chronicles, Largo Potter is a thirty-six-year-old sergeant and the leader of Squad Seven's lancer division. He is the oldest and most experienced member of the squad, having served as an anti-tank specialist since his conscription during the First Europan War. Despite his long service and survival of countless missions, Largo has consistently rejected all offers of promotion, believing that true value lies in frontline experience rather than rank.

His personality is gruff and direct, but he possesses a deep understanding of others' feelings and often acts as a calming influence within the squad. He is particularly close with the shocktrooper Rosina, whom he frequently tries to steady when her temper flares. Largo’s most significant relationship is with Captain Eleanor Varrot. The two enlisted at the same time and were posted in the same squad during the war, though their vastly different views on warfare led to frequent and heated quarrels. Over time, Largo made a heartfelt promise to stand by Varrot and protect her no matter what, a pledge that helped thaw the emotional distance she had developed after two decades of seeking vengeance.

Largo is physically large and serves as the squad's primary anti-tank lancer, using a heavy lance to destroy armored vehicles. He is also known for an unusual hobby: he once planted vegetables without authorization on army property, an act for which he was reprimanded, though the produce he grew earned praise from food lovers across the base. Throughout the story, Largo’s loyalty, experience, and steady nature make him a reliable backbone of Squad Seven, and his gradual efforts to bridge the gap between himself and Varrot contribute to his personal development as he shows that even a hardened veteran can soften his stance when it comes to those he cares about.