Who is the Ghibelline leader that is portrayed as an enemy of Dante?

The Ghibelline leader portrayed as an enemy of Dante in "Dante's Inferno" is Farinate Delgi Uberti. This character represents a faction that opposed Dante's political affiliations and ideals, as Dante himself was a member of the Guelphs, who were in conflict with the Ghibelline faction, which Farinate belonged to. In the Inferno, Dante encounters Farinate in the circle of the violent, where he is punished for his transgressions during his earthly life. The animosity between the Guelphs and Ghibellines was deeply rooted in Dante's experiences and the political landscape of his time, making Farinate a symbol of Dante's political adversaries. This context helps illustrate the importance of political themes within the epic and the personal nature of Dante's journey through the afterlife.

The other options do not represent Ghibelline leaders or enemies of Dante in this context. Harpies are mythological creatures, Virgil serves as Dante's guide, and Guido da Montefeltro, while a complex character with connections to the political issues of the era, does not directly oppose Dante to the same extent as Farinate.