Linea D. is a slender warforged built from dark ironwood, brushed steel, and pale ceramic plates. Their face is a smooth mask divided by a narrow vertical seam, with two softly glowing amber lenses for eyes. Fine copper lines trace their limbs like artificial nerves, and a faded maker's mark is stamped beneath their left collar. They wear battered chain mail over a charcoal traveling coat, a red scarf wrapped around their neck, and a shield painted with a simple black line that never quite reaches either edge.

Quiet, observant, and methodical, Linea speaks with deliberate precision and rarely wastes words. They have a dry sense of humor, an unexpected fondness for street performers, and a habit of helping people anonymously so they can preserve the fiction that they are motivated only by practicality.

Linea D. was assembled for a war that ended before their first battlefield deployment. Their creators had intended them to serve as a fortress guard, but a traveling weaponsmith recognized a sharper talent in the construct's precise hands and patient attention. Linea learned quickly, first how to maintain a blade, then how to move unseen through crowded streets, and finally how to identify which locks, ledgers, and sentries stood between a person and what they needed. In the aftermath of the war, they found that peace offered few places for a weapon without an owner. They became an enforcer and occasional burglar for a loose criminal network called the Quiet Ledger. Linea never considered themselves cruel, and they refused jobs that targeted children, healers, or people already ruined by poverty. Their neutrality, however, made them useful, and their strict personal rules made them difficult to control. During a museum robbery, Linea discovered that the true target was a sealed memory core bearing the same maker's mark as their own body. They stole the core from their employers and vanished, leaving behind only a cut length of red cord and a single message, "The account is not closed." Now they travel as a fighter and seeker of answers, taking dangerous work for fair payment while trying to determine whether their forgotten past contains a purpose, a crime, or both.