Leontios Katakalon

Origin

Leontios Katakalon was born as Leontije Duko, in the late 10th-century Byzantine Empire. The bastard of a Byzantine solider and a Serbo-Greek mother, Leontios was educated by Orthodox clergy and imperial scholars. He absorbed both the strict faith of the church and the restless curiosity of the court. While others prayed, he sketched water-driven machines in the margins of psalters and experimented with powders and oils.

Between Empires

His first work helped defend his native Thessalonike from Arab pirate raids that still haunted the Aegean, with makeshift barricades and water-channeled defenses. Drafted into the service of Constantinople and the emperor, by Alexios I’s reign, Leontios had already stood against Normans and Seljuks, his reputation spreading as an engineer who turned terrain into a weapon. Neither wholly trusted by the Romans nor fully embraced at home, Leontios lives in the cracks between powers. Byzantium sees him as expendable; others see him as foreign. Wherever he walks, he is out of place: a man of ideas and iron caught between shifting borders and brittle thrones. 

Skills and Knowledge

• Engineering & Siegecraft: Specializes in traps, improvised defenses, and mechanical devices to turn terrain into weapons.
• Alchemy & Early Chemistry: Crafts volatile mixtures, healing salves, and experimental compounds that blur the line between science and superstition. Sometimes these backfire.
• Languages & Codes: Fluent in Greek, Latin, and some Western dialects; his notebooks are written in cryptic shorthand.
• Combat Experience: Trained enough to defend his work, though he fights with precision and creativity rather than brute strength.

Personality

Leontios is a man scarred more by survival than defeat. He is proud and self-contained, outwardly calm, yet inwardly plagued by memories of massacres and failures. He distrusts rulers who use lives like coin, yet cannot escape serving them. His wit is dry, his temper buried deep, and his loyalty—when earned—unyielding. For all his rationality, he carries a soft, unspoken devotion to common people, and quietly bends his skills toward protecting them when he can.

Weaknesses

• Haunted by survivor’s guilt and prone to restless nights.
• Distrustful of authority to the point of self-sabotage.
• Reliant on wine, herbs, or alchemical tinctures to quiet his mind.

Themes & Hooks

• A man of reason trapped in irrational systems.
• A foreigner mistrusted everywhere he goes.
• A survivor who can never quite believe in survival.
• A craftsman whose devices may save lives—or kill indiscriminately.
• Makes a living being useful, but hates being used.