In episode 5, 'Treason', Arminius finds himself torn between his loyalty to the Roman Empire and his roots among the Cherusci tribe. His internal conflict intensifies as he grapples with the consequences of his actions, particularly after he learns of the betrayal brewing within the ranks of the Romans. Arminius's motivations are driven by a desire to protect his people while also navigating the treacherous political landscape of Rome.

In this episode, the relationship between Thusnelda and Arminius deepens as they confront the realities of their respective loyalties. Thusnelda, who is fiercely protective of her tribe, begins to question Arminius's allegiance to Rome. Their emotional exchanges are charged with tension, as Thusnelda struggles to reconcile her feelings for Arminius with her commitment to her people, leading to pivotal moments that test their bond.

The betrayal revealed in 'Treason' is significant as it highlights the fragility of alliances and the shifting loyalties among the characters. The episode showcases how personal ambitions and fears can lead to treachery, particularly within the Roman ranks. This betrayal not only affects the immediate characters involved but also sets the stage for larger conflicts that will impact the fate of both the Romans and the Cherusci.

Folkwin's reaction to the events in 'Treason' is one of anger and frustration. He feels betrayed by those he once trusted and is driven by a fierce desire to protect his tribe. His emotional state is volatile, as he grapples with feelings of helplessness and the need for revenge against the Romans. Folkwin's motivations are fueled by a deep-seated loyalty to his people, which propels him into action as he seeks to confront the threats they face.

In 'Treason', the Roman leaders make critical decisions that reflect their desperation and ambition. They plot to eliminate potential threats, including Arminius, whom they see as a liability. These decisions create a ripple effect, leading to increased tension and conflict between the Romans and the Cherusci. The choices made by the Roman leaders not only escalate the stakes for the characters but also foreshadow the impending clash between the two factions.