- Applicability: The Lady of the Green Kirtle uses genuine atheist arguments — Aslan is merely suggested in the mind by her cat as is the Sun by her lamp, the upper world is just a pacifying fantasy, etc. — to try and persuade the heroes that there is no Aslan (God) and there is no Narnia (Heaven). She could also be considered a Satanic Archetype.
- Ensemble Dark Horse: Camilla Power's portrayal of Jill in the BBC adaptation makes her the favourite out of the various child actors who starred in the series.
- Epileptic Trees/Fanfic Fuel: What exactly the Lady of the Green Kirtle is. At first she was said to be another witch along the lines of the White Witch. Then we found out in The Magician's Nephew that the White Witch was the only survivor of a destroyed universe, so the Lady of Green Kirtle couldn't have come from there. So who is she and where did she come from? For the movies, Word of God says that she is the source of the green mist added in the film version of The Voyage of the Dawn Treader, which was meant to foreshadow her role in the next story.
- Fanon: Some fans seem to think that the Lady of the Green Kirtle is actually Jadis the White Witch reborn. This mostly comes from a mistake in a manual (not written by Lewis himself) that describes Jadis as being in this book. Likewise Barbara Kellerman played both Jadis and the Green Lady in the BBC adaptations - but this is ignoring that several other actors also doubled up to play different roles across the adaptations (for instance, Kellerman also played the hag in Prince Caspian - three witches in one). It probably doesn't help that some characters theorize in-universe that the Lady of the Green Kirtle is similar to Jadis.
- Fridge Brilliance:
- At the beginning of the story, Caspian is going to find Aslan and ask him what to do about his successor, given that his son and heir has been missing for years. When Jill meets Aslan for the first time, he tells her that he has been calling her and Eustace since before they called to him, and he then gives her the mission of finding Prince Rilian. Aslan was planning the answer before Caspian had even asked the question!note
- The Lady of the Green Kirtle's clothing, and later her appearance as the serpent, was described as "green as poison." This always seemed like an odd simile... until one remembers that arsenic was often used in the dyeing of (green) garments and wallpaper during Victorian times.
- Hilarious in Hindsight:
- Puddleglum's climactic faith-affirming Author Filibuster, directed at an apparent Hollywood Atheist, rings of chain messages about good Christian students trouncing smug secular professors in arguments (though it should be noted that Lewis pulls it off a lot better than the authors of those copypastas do, seeing how he was such a talented wordsmith in general).
- The Green Lady, who bewitches people with her deceptively sweet appearance and music, is similar to the image that the haters painted of Taylor Swift during The New '10s, especially once they started calling Tay-Tay a snake after her spat note with Kanye West in 2016 (also note that illustrator Pauline Baynes drew the Green Lady as blonde). Although, the character more closely resembles the image adopted by Taylor herself as an ironic nod to the term's inference of her supposed insidiousness.
- Moreover, the notion of a shapeshifting reptilian invader, lurking within an Elaborate Underground Base and subtly acquiring power through governmental infiltration and mind control, is likewise eerily similar to Conspiracy Theories propounded by the likes of David Icke.
- My Greatest Failure: Averted. The kids seem to think that they have failed three of Aslan's four signs as they make their journey to find and save Rillian, and are particularly hard on themselves throughout the story. However, given that they ultimately succeed in their task, it is unclear whether or not they truly did fail any of them. While they clearly have difficulty in their interpretation of the signs, they have the help Aslan promised them in Puddleglum, and they eventually find their way to the Lady of the Green Kirtle's castle and save Rillian.
- Older Than They Think: The Lady of the Green Kirtle is often called the Green Lady, the Green Witch and the Emerald Witch, despite neither appearing in the book's text. However, the last nickname is actually semi-official: the back cover synopsis of each of the Collier Books editions of The Chronicles of Narnia (first published in 1970) do make reference to Rillian's escape from the "Emerald Witch"'s underground kingdom.
- Values Dissonance: It's not by far the only thing he bashes Experiment House for, nor even close to what is considered worst about it, but Lewis seems to have problems with secular and gender-integrated education.
- Values Resonance: The fact that the teachers allow such bullying to happen at the school is treated as a bad thing in the text. Despite School Bullying Is Harmless enduring for decades after this was written, this is quite telling. The book also averts Double Standard: Abuse, Female on Male, depicting Rilian's abduction and forced marriage as clearly horrific.
- What an Idiot!: On hearing the story of Rilian's mother's death from Glimfeather, Jill is perceptive enough to realize that the beautiful woman and the deadly snake are one and the same. Later on the trip, when they come across the Lady of the GREEN Kirtle riding her horse in the middle of nowhere, Jill remains totally unsuspicious.
YMMV / The Silver Chair