Dante is a Florentine poet, statesman, and philosopher who is traveling through the afterlife while still in his mortal, physical body. Seeking purification from sin, he undertakes a difficult climb up Mount Purgatory, marked with seven Ps on his brow to represent the sins he must purge. He actively engages his intellectual, sensory, and imaginative faculties to comprehend divine truths.

Virgil is a classical Roman pagan poet who resides in Limbo but receives a special commission to guide Dante. He applies human reason and classical philosophy to explain the nature of love, free will, and sin. Though wise and protective, his understanding has limits, as he cannot fully explain the mysteries of Christian faith that Dante will soon encounter.

Beatrice is the woman Dante loved from childhood who died young and now exists as a blessed soul in Heaven. She serves as Dante's ultimate spiritual guide, stepping in where human reason and pagan philosophy fall short. She is stern yet profoundly loving, demanding that Dante acknowledge his earthly missteps before he can proceed.

Sordello is an Italian poet from Mantua who resides in the area where souls await their opportunity to enter Purgatory proper. A patriotic figure, he is deeply disturbed by the political fragmentation of Italy. He assists the travelers by explaining the rules of the mountain and leading them to a safe resting place for the night.

Matelda is a joyful, radiant woman who inhabits the earthly paradise at the summit of Mount Purgatory. She acts as an intermediary, explaining the meteorological and spiritual mechanics of the holy forest to Dante. She performs the essential rituals of bathing souls in the rivers of forgetfulness and remembrance.

Forese Donati is a Florentine and a childhood friend of Dante. Despite passing away only five years prior, he has progressed quickly up the mountain due to the devout prayers of his widow. His physical form in Purgatory is shockingly emaciated, reflecting his current process of purification.

Statius is a first-century Roman epic poet who has just completed his purification on the terrace of avarice and prodigality. His release causes the entire mountain to tremble in joy. He professes a profound intellectual and spiritual debt to Virgil's poetry, which he claims led him both to his poetic calling and to his Christian faith.

Cato is a pagan Roman statesman who serves as the rigorous caretaker of Purgatory's shores. Known historically for his staunch moral integrity, he ensures that the rules of the mountain are followed. He directs Virgil to perform a cleansing ritual on Dante before they can begin their ascent.

Casella is a musician and a personal friend of Dante from life. When they meet on the shores of Purgatory, their attempt to embrace fails because Casella is an incorporeal spirit. He kindly obliges Dante's request to sing a soothing song, providing a moment of comfort before they are urged to move on.

Belacqua is an old acquaintance of Dante who is waiting on the lower slopes of the mountain. Because he delayed his repentance until the end of his life, he must wait outside Purgatory proper for a period equal to his earthly lifespan, unless aided by the prayers of the living.

Mark Lombard is a thirteenth-century Venetian nobleman purging his anger. He engages Dante in a sophisticated philosophical discussion about free will, the influence of the stars, and the necessity of sound political and religious leadership. He attributes the world's current corruption to poor governance rather than inescapable fate.

Oderisi is a renowned manuscript illuminator who is now repenting for the immense pride he took in his artistic talents. Subdued by the heavy burden he carries, he readily admits that another artist possessed greater talent, demonstrating that he has learned the fleeting nature of earthly fame.

Sapia is a noblewoman undergoing purification for the sin of envy. She confesses that during her life, she took more joy in the misfortune of others—specifically her fellow Sienese—than in her own good luck. She relies heavily on the prayers of others to aid her spiritual progress.

Guido del Duca is a soul purging his intense earthly envy. He delivers a scathing critique of the corruption running through the Arno valley, tracing the spiritual decay of the region's inhabitants. He laments the decline of noble families and the disappearance of chivalric virtues in Italy.

Rinieri is a member of a once-proud house whose descendants have degenerated. Repenting on the terrace of envy alongside Guido, he serves as a quiet audience to Guido's lamentations about the state of their homeland and the passing of great men.

Hugo Capet is the historical founder of the French royal line. Present on the terrace of avarice, he introduces himself as the humble son of a Parisian butcher and laments that he is the root of a corrupt royal tree. He forcefully denounces the greed, violence, and plundering committed by his descendants.

Bonagiunta is an Italian poet who engages Dante in a discussion about literary styles. He praises Dante's new style of poetry, which draws inspiration directly from love, recognizing that it surpasses the older, more artificial styles that he and his contemporaries practiced.

Guido Guinizelli is a poet purging the sin of lust. Dante highly reveres him, viewing him as a literary father figure. Demonstrating newfound humility, Guinizelli deflects Dante's high praise, pointing out another poet in the fire whom he considers his superior, before disappearing back into the flames to continue his purification.

Arnaut Daniel is a troubadour poet acknowledged as a superior craftsman by his peers. When Dante addresses him, Arnaut responds elegantly in Occitan, openly weeping over his past follies while maintaining a joyful hope for his spiritual future.

Manfred is a handsome, noble-looking ruler who died a violent death while excommunicated by the Church. He shows Dante his fatal wounds and explains that divine mercy is vast enough to accept anyone who repents, regardless of earthly excommunication.