Marcus Porcius Cato Uticensis is a Stoic Roman senator who has fled to Utica, Tunisia, to escape Julius Caesar's dictatorial reach. He rigorously values virtue, honor, and individual liberty above physical safety, choosing to resist tyranny rather than submit. His unwavering commitment to the Roman Republic makes him an inspiring, though exceptionally rigid, leader to the refugees and soldiers depending on him.

One of Cato's sons, Marcus is a young Roman who strives to demonstrate his family's trademark honor and bravery on the battlefield. He is consumed by a passionate, unrequited love for Lucia, which frequently distracts him from the political crisis at hand. He possesses a volatile temper that deeply worries his closest companions.

Cato's other son, Portius shares his father's honorable nature but struggles profoundly with personal emotional conflicts. He secretly harbors feelings for the same woman his brother pursues, creating a painful internal divide between his romantic desires and fraternal loyalty. He attempts to suppress his own happiness to maintain stability within his family.

Sempronius is a Roman senator who outwardly poses as a loyal ally to the Republic. In reality, he is driven by selfish ambition and anger over being denied the hand of Cato's daughter. He schemes to leverage the impending Roman collapse to secure his own advancement, willing to betray his countrymen to satisfy his desires.

A Numidian military leader who operates entirely on pragmatism and self-interest. Unlike the Romans who constantly debate honor, Syphax views virtue as a foolish illusion that traps inexperienced men. He actively attempts to corrupt the younger Numidian prince to abandon Cato, motivated by political opportunism rather than loyalty.

A young Numidian prince who deeply admires Cato and the Roman virtues he represents. He remains loyal to the republican cause despite the severe political danger it brings to his own kingdom. Juba is deeply in love with Cato's daughter, forcing him to balance his desire for personal joy with his commitment to honorable conduct.

Cato's daughter, who strives to emulate her father's rigid adherence to Stoic discipline. She commands the attention of multiple suitors, including a treacherous senator and an honorable prince. Though she harbors deep personal feelings, she outwardly refuses to entertain romance while her father faces mortal peril.

A Roman senator and trusted advisor to Cato. Lucius is defined by his exhaustion with the ongoing civil war and his profound desire for peace. He consistently advocates for yielding to Caesar in order to spare the lives of the remaining republicans, acting as a compassionate but cautious moderate in the war council.

The daughter of the senator Lucius, caught in a tense emotional triangle with Cato's two sons. Highly virtuous and acutely aware of the political and familial stakes surrounding her, she attempts to suppress her own romantic desires. She prioritizes preventing conflict between the brothers over her own happiness.

An emissary representing Julius Caesar's imperial forces. He brings an offer of friendship and a chance for amnesty to the rebellious faction. Decius serves as the physical representative of the dictatorial power the republicans are fighting against, delivering terms that force public declarations of defiance.