[2] Portrayed as a young and beautiful immortal woman with long blonde hair,[2][4] she is first shown wearing a blue gown and holding a lit candle.
[10] In the 1953 novel The Silver Chair, the Lady of the Green Kirtle, in the form of a snake, kills Ramandu's daughter while she is sleeping in a glade during a May ride with a twenty-year old Rilian.
[4] In the 1956 book The Last Battle, Ramandu's daughter is present, alongside her husband and son, as one of the "faithful" during the Great Reunion, in which all the series' good characters, except Susan Pevensie, are brought back together.
[13] Fantasy writer Colin Duriez said that Lewis was inspired by J. R. R. Tolkien's Middle Earth elves, specifically Lúthien and Arwen, who are both married to humans, to create the character.
[21] Lewis' step-son Douglas Gresham created the name Lilliandil for the movie,[20][22] and he said that it was intended to mimic the "imagery of the sea of lilies in the book as well as a very feminine and ethereal feel".
[12] English literature professor Devin Brown wrote that the character's respect for Aslan defines her goodness, in comparison to the evilness of the White Witch and her anger toward the lion.
[24] She identified the latter, and all witches in The Chronicles of Narnia series, as embodying what Lewis characterizes as an "infernal Venus"; he coined this term in his 1942 book The Screwtape Letters to reference a female character who seduces a man to his death.
Brown also wrote that Lewis foreshadows to the relationship through Caspian X's failed courtship with the Duke of Galma prior to The Voyage of the Dawn Treader.
[27] Miller wrote that the characters' interactions as husband and wife were restricted to the space between The Voyage of the Dawn Treader and The Silver Chair, only occurring in a place separate from Narnia.
She argued that the portrayal of the pair’s relationship represented how "romantic love and desire can exist in exotic, strange locations far from Narnia", while Lewis reserved the fictional world as "the land of innocence and wonder" where such ideas would be inadmissible.
Connecting Ramandu's daughter with the women in the House of Holiness from Edmund Spenser's 1590 epic poem The Faerie Queene, Elizabeth Baird Hardy interpreted her titles as "idealized identifications of the virtues they represent", with Lewis' character corresponding to charity and hope.
Hardy wrote that Ramandu's daughter was similar to Eve before the fall of man, describing them as "free from pretension and keenly aware of their roles in the universe".
Cathy McSporran likened the character's possession of the Knife of Stone, an instrument used to martyr Aslan,[c] to the maiden's connection with the Holy Grail and the spear used in the crucifixion of Jesus.