One of Cymbeline’s sons, stolen by Belarius from the nursery as a baby. Belarius raised Guiderius with the Welsh pseudonym “Polydor.” Like his brother Arviragus, Guiderius is hearty and inherently noble. The two yearn to make contact with the wider world after growing up in the remote countryside of Wales. Belarius worries that Guiderius’ will to fight and his desire for fame will reveal him for the royal that he is. Guiderius fights for honor, and does not stand Cloten’s insults, killing and beheading Cloten to preserve his own reputation. Guiderius is a fierce warrior, and he helps save Cymbeline’s life during the battle with the Romans. He freely admits to killing Cloten, not shying away from admitting to a crime committed for the sake of honor. Belarius’ confession that Guiderius is the King’s kidnapped son saves Guiderius from execution.