After years of longing to return to Narnia, Susan Pevensie steps through the wardrobe one last time, only to find herself in the harsh, unfamiliar world of Gor. Alone, disoriented, and far from the magic and comfort of Narnia, she must navigate the dangers of this cruel land. Through Susan's eyes, we witness her struggle to adapt, the loss of innocence, and the reality of survival in a place where her beauty and strength may become both her greatest asset and vulnerability.

Susan Pevensie is a fictional character in C. S. Lewis's The Chronicles of Narnia series. Susan is the elder sister and the second eldest of the 4 Pevensie children, which are Lucy, Edmund, herself, and Peter. She appears in three of the seven books – as a child in The Lion, the Witch and the Wardrobe and Prince Caspian, and as an adult in The Horse and His Boy. She is also mentioned in The Voyage of the Dawn Treader and The Last Battle. During her reign at the Narnian capital of Cair Paravel, she is known as Queen Susan the Gentle or Queen Susan of the Horn. She was the only Pevensie that survived the train crash (because she was not on the train or at the station) on Earth which sent the others to Narnia after The Last Battle.

Susan was born in 1928 and in The Lion, the Witch and the Wardrobe, Susan and her brother Peter discover Narnia after their younger siblings. Father Christmas gives Susan a bow with arrows that never miss their target, and a magical horn that brings aid when blown. Susan is advised to stay out of the battle. After the battle, she is crowned as Queen of Narnia by Aslan, and becomes known as Queen Susan the Gentle.

In Prince Caspian, Susan and the other Pevensies are magically transferred to Narnia from a railway station in England. She is described as being gentle and tender-hearted and she immerses herself in their adventures as deeply as in the first book.

In The Voyage of the Dawn Treader, Susan accompanies her parents on a trip to America, while Peter is being tutored by Professor Digory Kirke.

In The Horse and His Boy, set during the Pevensie siblings' reign in Narnia, Susan is asked, and almost forced, to make a diplomatic marriage to the Calormene Prince Rabadash. Though much of the plot revolves around her rescue from this situation and Rabadash's militant response, she herself appears in only one scene.

In The Last Battle, Susan is conspicuous by her absence. Peter says that she is "no longer a friend of Narnia", and (in Jill Pole's words) "she's interested in nothing now-a-days except nylons and lipstick and invitations". Thus, Susan does not enter the real Narnia with the others at the end of the series. It is left ambiguous whether Susan's absence is permanent.

As something of a footnote, "The Problem of Susan" is a 2004 short story written by Neil Gaiman which is in part a homage to The Chronicles of Narnia, and the character of "Professor Hastings" is highly implied to be Susan Pevensie (if not literally for legal reasons).