Final answer:
In the myth of Jason and the Golden Fleece, the main characters are Jason and his crew of Argonauts, with heroes such as Heracles, Orpheus, and the Dioskouroi, as well as Medea, who helps Jason on his quest.
Step-by-step explanation:
The main characters in the myth of Jason and the Golden Fleece include Jason, who is a celebrated mythical Greek hero. Known for his quest to retrieve the Golden Fleece, Jason is accompanied by a group of heroes known as the Argonauts, which included notable figures such as Heracles (also known as Hercules in Roman mythology), Orpheus, the Dioskouroi (Castor and Pollux), and many others. While Jason is the central figure, the narrative is enriched by the diverse cast of companions, each bringing their own unique skills and background to this epic adventure.
In addition to the heroes, other significant characters in the story may include Medea, a sorceress who aids Jason in his quest and eventually becomes his wife, and Pelias, the usurping uncle of Jason who sets him on the perilous journey to capture the fleece. The myth encompasses themes of betrayal, revenge, and the complexity of human relationships, as well as the quintessential hero's journey structure.
Greek mythology is known for its array of heroes, and some of these, like Jason and Heracles, did not just partake in their own adventures but would often cross paths in myths such as the Argonauts' expedition for the Golden Fleece.