L-elf, also known as L-elf Karlstein, whose real name is Michael, is the deuteragonist of the anime series. He is a 17-year-old elite special agent originally serving the Dorssian Military Pact Federation. He was raised from childhood as a soldier within the harsh environment of the Dorssian military's Karlstein Institute, where he was conditioned to follow orders without question and trained extensively in espionage, assassination, strategy, and infiltration. This upbringing molded him into a highly intelligent, calculating, and stoic individual who approaches situations with a detached and pragmatic mindset. He is known for his extraordinary strategic intellect and his ability to break down complex situations, a reputation that earned him the nickname "One-Man Army" from enemy ARUS forces after he single-handedly fought through an army of five thousand soldiers. Despite his cold and uncaring exterior, he is capable of deep emotions, including anger, love, and compassion, though he often keeps these hidden. His primary motivation is to instigate a revolution within Dorssia and overthrow its oppressive regime. He is driven by a belief that true change requires revolutionary action, a conviction that leads him to defect from his original mission. After being captured by Haruto Tokishima and recognizing Haruto's potential, L-elf forms an uneasy alliance with him. He subsequently assumes command of the fighting forces of New JIOR, the independent nation formed by the students of Module 77, and becomes their chief strategist. In this role, he orchestrates daring counterattacks, infiltrations, and propaganda campaigns against both Dorssian forces and the secret organization known as the Magius. A key emotional core for L-elf is his deep, cherished connection with Princess Lieselotte W. Dorssia, whose existence fuels his dream of creating a world where people like her can live freely. Her eventual death becomes a major turning point that solidifies his resolve to dismantle the corrupt systems controlling the world. His relationships with his former Karlstein comrades, such as A-drei, X-eins, H-neun, and Q-vier, become strained after his defection, with ideological divides creating conflict between them. His partnership with Haruto Tokishima represents a central axis of the series, merging L-elf's cold logic and strategic planning with Haruto's impulsive idealism. Throughout the series, L-elf undergoes significant development, transforming from a soulless tool of the Dorssian empire into a revolutionary leader and a symbol of rebellion. He evolves from a ruthless agent into a visionary who questions the nature of freedom, loyalty, and self-worth. Among his notable abilities are his extraordinary strategic intelligence, his prowess in combat with various weaponry, his skills in hacking and espionage, his fluency in multiple languages, and his ability to remain calm and think several steps ahead under pressure. His codename translates literally to "L-11," reflecting his numerical designation within the Karlstein group.