Duessa serves as an important foil for Una in Book I of The Faerie Queene. Una represents truth in the allegory of the poem, and Duessa represents falsehood and deception. Duessa’s early success in seducing Redcross and separating him from Una demonstrates the ease with which deception clouds our judgment and leaves us blind to the truth. Both Una and Duessa appear to be beautiful and virtuous young women, though Duessa’s guise is exposed as a superficial illusion. After Arthur defeats Duessa and Orgoglio, Una calls for her rival to be stripped naked. The narrator states:
Which when the knights beheld, amazd they were,
And wondred at so fowle deformed wight.
Such then (said Vna) as she seemeth here,
Such is the face of falshood, such the sight
Of fowle Duessa, when her borrowed light
Is laid away, and counterfesaunce knowne.
Thus when they had the witch disrobed quight,
And all her filthy feature open showne,
They let her goe at will, and wander wayes vnknowne.
Medina serves as a foil to her two sisters, Elissa and Perissa. Guyon and the Palmer encounter the three sisters with very different personalities at their home, a castle constructed on a rock by the sea. After describing the joyless Elissa and the pleasure-craving Perissa, the narrator presents a portrait of the moderate Medina:
Unlock with LitCharts A+Betwixt them both the faire Medina sate
With sober grace, and goodly carriage:
With equall measure she did moderate
The strong extremities of their outrage;
That forward paire she euer would asswage,
When they would striue dew reason to exceed;
But that same froward twaine would accourage,
And of her plenty adde vnto dieir need:
So kept she them in order, and her selfe in heed.