No, she is not. She is a fallen power who has distanced herself from Christ and God. She wears white not for purity but because white is the absence of all color/emotion.
Tilda Swinton played the White Witch in the first movie: The Lion the Witch and the Wardrobe.
The White Witch from Narnia, also known as Jadis, can be seen as a representation of evil and temptation, similar to the character of Satan in Christianity. She uses manipulation and deceit to try and subvert the characters and turn them away from Aslan, who represents goodness and redemption.
The White Witch is named Jadis. She was brought into Narnia by Digory Kirk and Polly Plumber from a different world called Charn, and she made Narnia so that it was always winter. The White Witch appears in the following Narnia books:The Magician's NephewThe Lion, the Witch and the WardrobePrince CaspianVoyage of the Dawn TreaderThe Silver Chair
Jadis of Charn, aka the White Witch.
Her name was Jadis the White Witch.
Aslan
The White Witch is the usurping and self-proclaimed Queen of Narnia. She is cruel and power-hungry and keeps the land encased in a perpetual winter. If anyone defies her power, she turns them to stone with her magic wand. She represents the devil and evil in general. Silvermistwaterfairy says: If you have read The Magician's Nephew, then you should know Jadis, the evil queen who destroyed all of Charn except herself. The White which is the same Jadis and she is not human, she is half Jinn (Adam's first wife was Jinn) and half giantess.
In the Narnia movie series, the character of the White Witch, who is the antagonist and queen of Narnia, was played by Tilda Swinton in "The Lion, the Witch and the Wardrobe" (2005) and Jadis (the White Witch) in "The Chronicles of Narnia: The Magician's Nephew" (which hasn't been released yet).
Her name is Jadis, but is known to most as the White Witch.
The White Witch
Father Christmas does not reappear in Narnia after "The Lion, the Witch, and the Wardrobe" because Aslan has restored balance to the land, eliminating the eternal winter imposed by the White Witch's curse. With peace restored, there is no need for Father Christmas to return to Narnia.
Edmund lied because he was trying to gain favor with the White Witch by telling her about his siblings and their presence in Narnia. He was also feeling jealous of his older brother Peter and wanted to appear important in the eyes of the White Witch.