he Lady of the Lake is the name of several related characters who play parts in the Arthurian legend. These characters' roles include giving King Arthur his sword Excalibur, enchanting Merlin, and raising Lancelot after the death of his father. Different writers and copyists give her name variously as Nimue, Viviane, Elaine, Niniane, Nivian, Nyneve, Nimueh and other variations. [1]

Alfred Tennyson adapted several stories of the Lady of the Lake for his poetic cycle Idylls of the King. He splits her into two characters; Viviane is a deceitful villain who ensnares Merlin, while the Lady of the Lake is a benevolent figure who raises Lancelot and gives Arthur his sword. Nimue appears in T. H. White's The Once and Future King as Merlin's love interest. True to the legend she traps Merlin in a cave, but Merlin does not convey it as negative, and even refers to it as a vacation.
The character plays a major role in The Mists of Avalon by Marion Zimmer Bradley. In Bradley's works, both the Lady of the Lake and the Merlin are offices. The Lady of the Lake is the title of the ruling priestess of Avalon, and the Merlin is a Druid who has pledged his life to the protection of Britain. In The Mists of Avalon, Viviane is the Lady of the Lake as the story opens, and is later succeeded by the priestess Niniane. Niniane is in turn succeeded by Morgan le Fay (called "Morgaine" in this version), while the Merlin is seduced by Nimue. In this version, Nimue is a sympathetic and tragic young priestess who falls in love with the Merlin but is duty bound to seduce and lure him to his death, and who then commits suicide herself.
Mystery novelist Raymond Chandler wrote The Lady in the Lake in 1943, which revolves around a set of mysterious deaths in the San Bernardino Mountains. Here, the symbolic Arthur, questing for the Grail of truth and adhering to his own chivalric code, is Chandler's hero Philip Marlowe. As in the original tales, Marlowe's lady in the lake is not what she first seems, and has a devastating effect on her lover.
The murder victim Margaret Hogg, whose body was found in a lake in England's Wasdale Valley in 1984, became known as "the Wasdale Lady in the Lake". Similarly, an unidentified murder victim thought to have been killed by the Cleveland Torso Murderer in the 1930s is referred to as the "Lady of the Lake".
Polish fantasy writer Andrzej Sapkowski introduced Nimue to his Witcher saga in The Swallow's Tower (1997), and focused on her in Lady of the Lake (1999). The 1998 made-for-television movie Merlin features a character named Nimue, played by Isabella Rossellini, who meets and falls in love with the young Merlin. This character is distinct from the Lady of the Lake, played by Miranda Richardson.
In Spamalot, a musical theatre adaptation of Monty Python and the Holy Grail, the Lady of the Lake takes the role of the female lead. She is a stereotypical diva, as evidenced by her solo in act two, "Diva's Lament (Whatever Happened to My Part?)". She also is very eager to get Arthur to marry her, going so far as to have a dress that converts into a wedding gown in a single motion. This Lady of the Lake's real name was revealed to be Guinevere at the end of the show.
In Robert Graves's novel 1949 Seven Days in New Crete, also known as Watch the North Wind Rise, depicting a future world where the present monotheistic religions are discarded and the Triple Goddess once again rules supreme, "Nimue" is the name of the Goddess's "Maiden" manifestation.[5]
The Lady is the patron deity of the nation of the Arthurian-based Bretonnia in the Warhammer Fantasy universe. T. A. Barron's Lost Years of Merlin series and The Great Tree of Avalon series feature the evil Nimue and the good Lady of the Lake as two separate characters. She also appears in Stephen R. Lawhead's Pendragon Cycle, as Charis, A Faery from the lost land of Atlantis, When she arrives in Britain after the devastation of her homeland, she marries Taliesin, Chief Bard of Britain, and is mother of Merlin.
Under the name Elaine (Ellie) Harrison, the Lady is the protagonist and narrator of Meg Cabot's Avalon High young adult novel.
Nimueh has also appeared in several episodes of the 2008 BBC television series Merlin, where she is a powerful sorceress who has tried to kill both the young Arthur and Merlin.
In the Age of Wonders universe, Nimue is a vain (female) wizard with control over the element of water. In the Age of Wonders II campaign, Merlin (the player) fights her and her human forces.