L-elf Karlstein was born and raised in the harsh environment of the Dorssian Military Pact Federation, where he was trained from a young age to be a soldier. As a child soldier, L-elf was conditioned to follow orders without question, trained in the arts of espionage, assassination, and strategy. His initial role in the Dorssian forces was to infiltrate JIOR’s Dyson Sphere alongside his team to secure vital information and further the Federation’s goals.

Despite his early loyalty to Dorssia, L-elf becomes increasingly disillusioned with the oppressive nature of the regime. He is driven by the belief that true change can only come through revolution, and he aims to bring about this revolution not only in Dorssia but across the world. His mission becomes more complex when he encounters Haruto Tokishima, whose actions and ideals challenge L-elf’s beliefs and force him to confront his own sense of morality.

Over time, L-elf’s desire for revolution and his personal vendettas lead him to work with the Valvraves, mecha machines that hold the potential to change the balance of power. As he navigates the shifting allegiances of the war, L-elf’s backstory and motivations are revealed, showing the internal conflicts he faces as he works to achieve his revolutionary goals.

L-elf Karlstein has a striking appearance, with silver hair and sharp, calculating eyes that reflect his cold, strategic mind. His expression is often serious and focused, a reflection of his disciplined background as a soldier. His attire typically consists of the military uniform of the Dorssian Military Pact Federation, which he wears with a sense of purpose and authority.

As the series progresses, L-elf adopts a more practical and combat-ready look, especially when he begins to work alongside Haruto and the Valvraves. His appearance is both intimidating and elegant, mirroring his dual nature as a ruthless agent and a revolutionary. L-elf’s physical build is lean and athletic, indicative of his training as a soldier, and he carries himself with an air of confidence and self-control.

L-elf Karlstein is highly intelligent, calculating, and strategic. His upbringing as a child soldier has molded him into someone who values efficiency and precision, often approaching situations with a detached and pragmatic mindset. He is deeply committed to his cause bringing revolution to Dorssia and the world and is willing to make difficult and sometimes morally ambiguous decisions to achieve his goals.

Despite his cold exterior, L-elf is not devoid of emotions. His past experiences have shaped his personality, and his growing disillusionment with the Dorssian regime fuels his desire for change. L-elf’s complex moral compass is constantly challenged by the events around him, particularly through his interactions with Haruto, whose ideals and actions force him to confront his own beliefs and question his mission.

L-elf is a skilled manipulator, able to navigate the complexities of politics and war with ease. He is calm under pressure and is always thinking several steps ahead, a trait that makes him a formidable opponent. However, his interactions with Haruto and the other members of the Valvrave team show a more vulnerable side, as L-elf begins to experience the emotional weight of his choices.