This churchman comes with Valentio to bring monk's habits to Foscari and Dulcino. He reminds the would-be monk Foscari of the hardships of living in a religious house, and he prepares to hear Lodwick's confession.
ASTELLA
Astella is the neglected wife of Lodwick and is staying with Cleona. She is the duke's sister-in-law and firmly resents Piero's attempt to seduce her upon Lodwick's urging.
BELINDA
Belinda is Grimundo's wife. In a ruse to tame the lascivious Lodwick, Belinda agrees to dress richly and appear to Lodwick as a shape-changing devil. Belinda receives grateful thanks from the duke for her help in reforming his brother.
CLEONA
Sought after by the duke, Cleona is Foscari's mistress. Because everyone believes Foscari dead, Cleona prepares to accept the duke's courtship. Foscari, however, is alive, and Cleona welcomes back her lover near the play's end.
DUKE of SAVOY
The Duke of Savoy has planned to wed Leonora, but when she disappears he turns his attentions toward Cleona. Presiding over a ceremony that will induct Foscari and Dulcino into the church, the duke discovers that Dulcino is Leonora, disguised as a page in order to test the duke's love. The duke then brings Cleona and Foscari together as he plans his own union with Leonora.
DULCINO
Dulcino is Leonora in disguise. Uncertain of the Duke of Savoy's love, and wary of being thrust into a state marriage, this Milanese lady assumes the role of Foscari's page in order to test the duke's love. Leonora is tested herself, however, when as Foscari's servant she must go along with her master's plan to enter a religious house. When she accompanies Foscari to the duke's home and would don a churchman's habit along with Foscari, the churchman Valentio reveals Leonora's identity. The play ends with Leonora confident of the duke's honor and planning to wed him.
FABRICHIO
Fabrichio is a nobleman of Savoy. He has been sent by the duke to arrange a treaty with Milan through a marriage between the duke and Leonora.
FOSCARI
Foscari is a noble count of Savoy and Cleona's lover. Supposed dead, Foscari employs Dulcino as page, unaware that his new servant is really Leonora of Milan. Originally planning to reveal himself to Cleona, Foscari discovers the duke's interest in her and plans instead to join the church, allowing Cleona to wed the duke. When he arrives before the duke to receive a churchman's habit, however, he witnesses the discovery of Dulcino as Leonora, as well as the pledge made between Leonora and the duke. Foscari chooses to wed the joyous Cleona rather than enter the church.
GIOTTO
Giotto is a nobleman of Savoy. He and nobleman Sorazzo pity Astella, the neglected wife of Lodwick, and they discuss the duke's forthcoming attendance at a ceremony initiating two nobles into the church.
GRIMUNDO
Grimundo, as a lord of Savoy and tutor of the duke's brother Lodwick, is just as disappointed as the duke in the profligate ways of Lodwick. He devises a final ploy to urge Lodwick's reform. Pretending to be licentious himself, he promises Lodwick a wild experience with a lady. He brings Lodwick into a grove where supposed satyrs play, and he arranges for his own wife Belinda to play the part of a seductive, richly-dressed shape-changing devil. In addition to finally reforming Lodwick, Grimundo is also aware that Foscari is not truly dead, and that the duke has designs upon Foscari's mistress Cleona.
JACOMO
Jacomo is Cleona's ambitious but foolish steward. He very much wants his lady to wed the duke, expecting to improve his own status in the process.
LEONORA
Leonora is disguised as Dulcino for most of the play's duration. Uncertain of the Duke of Savoy's love, and wary of being thrust into a state marriage, this Milanese lady assumes the role of Foscari's page in order to test the duke's love. Leonora is tested herself, however, when as Foscari's servant she must go along with her master's plan to enter a religious house. When she accompanies Foscari to the duke's home and would don a churchman's habit along with Foscari, the churchman Valentio reveals Leonora's identity. The play ends with Leonora confident of the duke's honor and planning to wed him.
LODWICK
Lodwick is the wild and lascivious brother of the Duke of Savoy. Wed to Astella, a virtuous and long-suffering woman whom he neglects, Lodwick tries to trick Astella into a forced divorce by asking Pietro to seduce her. He also believes Grimundo's promise of a chance at revelry with a lady, and he accompanies Grimundo to a grove where supposed satyrs play. All of Lodwick's ambitions are foiled by the play's end. In the grove he finds what he thinks is a shape-changing devil instead of an easy female conquest, and his friend Pietro fails to seduce Astella. Lodwick confesses his sins to the Abbot, promising a complete reform for the future.
PIETRO
This companion of Lodwick agrees to try to seduce Lodwick's wife Astella, forcing her into infidelity and then divorce. Though at first Pietro claims to have accomplished what Lodwick asked, he eventually admits that Astella rebuffed him and remains chaste.
SILVANUS
Silvanus organizes and directs the satyrs in the grove where Grimundo takes Lodwick to visit a lascivious lady.
SORANZO
Soranzo is a nobleman of Savoy. He and companion Giotto pity Astella, the neglected wife of Lodwick, and the two nobles also discuss the duke's forthcoming attendance at a ceremony initiating two nobles into the church.
VALENTIO
Valentio is a religious man whom Foscari calls upon for help in entering the priesthood. Valentio also knows that Leonora is masquerading as the page Dulcino. At the ceremony during which Foscari and Dulcino are to receive their monk's habits, Valentio shows the duke certain papers that reveal Dulcino as Leonora.