Ruska Demitorius, also identified as Ruska Atticus Demitorius, belongs to the Emperor's Bare-Handed Fighting Corps. He is the son of Demitorius of Attica, a noted figure within the narrative. Ruska possesses blonde hair, blue eyes, and the appearance of a teenage male. Known by the epithet "Golden Ruska," he demonstrates significant mastery of Pankration by age sixteen. His combat style prioritizes tactical analysis, spatial reasoning, and precise counterattacks, leveraging agility and reflexes. Outside combat, he remains reserved and analytical; within engagements, he shifts to an assertive focus on efficient victory, framing this approach as respect for opponents.

He first encounters Cestvs near a statue of Emperor Augustus, observes his chains to deduce his status as a slave-boxer, and provides directions when Cestvs becomes lost. Later, in the arena, Ruska decisively overwhelms Kendall from Carthage without employing his fists.

Ruska's personal history involves substantial conflict with his father, Demitorius, stemming from Demitorius's contempt toward Ruska and his mother, Lucretia—actions contributing to her mental decline. Ruska harbors a driving ambition to defeat Demitorius personally, perceiving his father's educational methods as cruelty rather than instruction. This familial strife shapes his resolve despite his privileged upbringing. Emperor Nero interacts with Ruska, seeking supporters among skilled fighters after being impressed by his capabilities alongside Cestvs's.