In A Court of Thorns and Roses, Feyre does more than save herself. She saves her beloved Tamlin, her family, and the Fae of the seven courts of Prythian.
Feyre undergoes an arc of epic proportions. In the beginning, she is the practical but least favorite child in a poor human family. She does the work her father and sisters will not do. After they became impoverished, she hunts with bow and arrow to provide them with food and clothing.
After she kills a wolf, Feyre's world is turned upside down. Unlike in a typical hero-or-heroine story, she is not called to adventure. She is taken against her will by Tamlin, one of the Fae who, to her knowledge, have terrorized humans for generations.
Feyre seeks adventure by leaving the protective borders of Tamlin's manor in the Spring Court. She faces and defeats enemies with the aid of mentors. In that respect, the heroine's path follows the typical plotline. But her story diverges from the typical plotline when she returns to Prythian.
In the typical plotline discussed by Joseph Campell and later by Christopher Vogel, the hero faces ordeals that transform him or her. They are rewarded and then return to the ordinary world. Feyre's story differs because she passes into the extraordinary world twice.
Not only does she go to the Fae's magical world but she also visits a version of the Underworld. Like classical heroes, Odysseus, Aeneas, and Orpheus she bravely enters the land of the undead, Amarantha's realm "Under the Mountain." She retrieves Tamlin, who, diminished at Amarantha's side, is spiritually dead.
Like Psyche, Feyre faces three impossible tasks before she can triumph and become immortal. Feyre never expects to become immortal. She merely wants to liberate her beloved and others enslaved by Amarantha.
While Feyre's story can be seen as version of the hero's story discussed by Joseph Campbell, in some ways, her story is even more intriguing. She is a human who rescues immortals by going into two extraordinary worlds before returning "home."