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We're here. All of us, as promised, in the flesh.. and now it's time to get to work, to do what Dark Ones do best... snuff out the light.
~ Nimue to Captain Hook

Nimue is the true main antagonist in the first half of the fifth season of ABC's Once Upon a Time and the first Dark One.

She is portrayed by Caroline Ford and Guy Fauchon (while masked).


Before First Curse

She was the true love of the sorcerer Merlin, with whom she went on a quest with one day to make a sword out of the Holy Grail, stripping him of his powers and allowing him to be mortal and be with his love. However, during an encounter with Vortigan, the man who destroyed her town looking for the Grail she is fatally stabbed by him. However, she recovers shortly after due to drinking from the Grail herself, and rips Vortigan's heart out, with the intention of killing him. Merlin warned her that doing so while having the power from the Grail would cause her to succumb to the Darkness, which she refuses to acknowledge. As such, she crushes Vortigan's heart and kills him. To prevent Merlin from taking away her powers using the newly-constructed Excalibur (made from the Holy Grail's metal), she breaks it. Now, she has become the first ever Dark One, now wearing Vortigan's mask and clothing as her own.

Merlin used one half of the snapped Excalibur to create the Dark One's Dagger, biding the soul of the Darkness' host to it and forcing whomever the unfortunate soul is to be enslaved by the bearer of the Dagger. Shortly after accomplishing this feat, Merlin intended to use the Dagger to kill Nimue, blaming the Darkness for killing the woman she loved (by this time, the audience is led to believe that Vortigan is meant to be the Dark One), but cannot bring himself to do it. Dropping the Dagger. Merlin is transformed into a tree by Nimue, who departs with the Dagger.

At some point, she constructs the Vault of the Dark One, which would allow the current Dark One to come back to life using the Darkness. It would later be used centuries later by Baelfire, son of the Dark One Rumplestiltskin, to bring back his father after he had perished. At another point, she tried to steal Merlin's most-treasured item, the Sorcerer's Hat (which had the power to cleave her soul from the Dagger and not be controlled by it), from his Apprentice, but is unable to take it.

She is apparently killed off by her successor and is sent to the Underworld for her evil. However, she is able to communicate from the Underworld through the mind of the current Dark One.

Before Third Curse

When Emma Swan, the new Dark One, summons her to extract the last flame ember of the first fire (the Fire of Prometheus, which was used to melt down the Holy Grail), she mocks Emma for being nothing without Darkness. Emma rips the ember needed to complete Excalibur from her in response saying that she was never nothing. Nimue reminds Emma that she'll still be waiting in Emma's mind, but she had still decided to choose good over evil. A while later, she persuades Captain Hook, who also became a Dark One after Emma used the sword to save his life, to sacrifice Merlin's heart to create a Dark Curse to return everyone to Storybrooke where Hook may have revenge on Rumplestiltskin. Being the third time that the dreaded Dark Curse is cast, everyone is returned to Storybrooke; however, Emma manages to remove everyone's memories of the past six weeks in Camelot so that no-one would know that Hook is the Dark One.

After Third Curse

In Storybrooke, Nimue and the past Rumple appear from Emma's mind along with all other Dark Ones and watch her complete Excalibur.

Hook is taken by Darkness Rumple to the pond which has a connection to the Underworld, and he sinks his hook under the surface. The hook, covered in the blood of a former Dark One (Gold, although still alive) allows all Dark Ones, Nimue included, to return to the world of the living. Nimue, wearing her mask, leads the group and walks on the water's surface towards Hook, graciously accepting his hand and removing her mask. She tells Hook they must do what all Dark Ones were meant to do - snuff out the light. Hook welcomes her to Storybrooke as the Dark Ones descend upon the town, bringing the full power of the living Darkness with them.

Nimue is the main antagonist of the Winter Finale, "Swan Song". She marks each of the heroes with the mark of Charon, sacrificing their lives for the Dark Ones'. She blasts the heroes and teleports them to the lake, where all Dark Ones are gathered. When Emma tries to stop her and Hook, she attacks Emma and easily incapacitates her. Hook snaps out of his evil, saying that this is enough. He turns on Nimue. She smirks, saying he can't defeat her, but he responds that he can before using Excalibur on her, causing her to disintegrate slowly and be sucked into the sword as part of the Darkness. Emma tearfully kills Hook with Excalibur, causing the whole situation to end and all the Dark Ones of the past to be sent back to the Underworld. The Mark of Charon disappears from all the heroes and Storybrooke is saved, but at the cost of Hook's life; this begins Emma's quest to the Underworld.


  • Nimue was also the main antagonist of the first season of the television series Merlin.
  • In "Dreamcatcher", male actor Guy Fauchon is credited on the press release and in the episode credits as "Vortigan", whose face was covered by a mask in the episode. However, thanks to the flashbacks shown in the seventh episode of the fifth season, it was proven that the character billed as "Vortigan" in "Dreamcatcher" is supposed to be Nimue, a female character, disguised by a mask.
  • Nimue is a Bigger Bad to the series, as she is the one who started the cycle of the Dark Ones, and the first to harness the power of the Darkness. On the converse side, Vortigan is this to her; had he not killed her family, she would've never become the Dark One in the first place, and thus the Dark One would have never existed.
  • In the overall story of Season 5A, Nimue is the true main antagonist, making Emma Swan the false main antagonist turned anti-hero, Captain Hook the second main antagonist turned anti-hero, King Arthur the secondary antagonist, Zelena the tertiary antagonist, and the Darkness the Bigger Bad (being the source of her power).
  • Nimue is the de facto Big Bad of Season 5A, since she was manipulating Hook the entire time, Emma was more of an anti-villain and Arthur and Zelena were only the main antagonists for the past storyline.
  • Nimue is similar to Anakin Skywalker a.k.a Darth Vader because the individual whom used to have close relationship with them stated to the heroes that they were killed by villains, only to revealed that the so-called villains whom killed them turned out to be their own alter-ego as the said individual unable to tell the heroes that they actually turned to the dark side instead of killed (Obi-Wan Kenobi stated to Luke that Anakin was killed by Darth Vader only for Luke himself later learned that Anakin was never killed at all and Darth Vader was actually Anakin's alias as a Sith apprentice after he became evil. In Nimue's case, Merlin claims that Nimue was murdered by the first Dark One to Emma, only for Emma to later learn that Nimue actually turned to the dark side and became the first Dark One herself).
  • Nimue is both a Bigger Bad and a Big Bad. She was a Bigger Bad for Rumple and the other Dark Ones during the first four seasons and a direct Big Bad in the fifth season.


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