Sylvie Laufeydottir (born Loki Laufeydottir) is a fictional character portrayed by Sophia Di Martino in the Marvel Cinematic Universe (MCU) media franchise, partially based on the characters Lady Loki and Sylvie Lushton's Enchantress from the Marvel Comics.

[11] Hiddleston expressed excitement for Di Martino taking the role, commenting: "I cannot wait for audiences to see Sophia in this...she has mischief, playfulness, maybe a little bit of interior fragmentation and some broken emotions...but [she is] so committed and she made it completely her own [with] her own preparation and research and it was such a fun dynamic.

"[19] Rachel Paige of Marvel.com defined Sylvie as being "incredibly guarded with tall walls built up around her to protect herself from everything—both physical fights and feelings."

The character's arc sought to break down these walls while maintaining a focus on revenge against the TVA trumped all other aspects of her development.

"[22][23] Di Martino, commenting on the season one finale, found that "for Sylvie, she's just on a revenge mission" due to "having her life...ruined, [taken away from her], this sort of anger.

[24] Like Loki, she is bisexual, an aspect Herron and Di Martino found to be important for representation and to honor the Norse mythology of the character.

She is arrested by Ravonna Renslayer on behalf of the Time Variance Authority (TVA) as a child for "crimes against the Sacred Timeline".

Over the following centuries, Loki learns to hide herself from the TVA, adopting the alias "Sylvie" and developing a method of body possession, dubbed 'Enchantment', to achieve her ends.

She travels to 2050 Alabama and is tracked down by another variant of herself during a hurricane there, where, upon rejecting his offer to work together to overthrow the Time-Keepers and revealing herself to him, she executes her scheme; teleporting the charges she stole to various locations across the timelines, causing branches to form on the Sacred Timeline to distract the TVA so that she can assassinate the Time-Keepers.

Sylvie and Loki plan to instead hijack the evacuation ship, which according to the "Sacred Timeline" will be destroyed before leaving the moon, only to fail.

Hunter B-15 intervenes, freeing them of their collars, and in the ensuing fight, the Minutemen are killed whilst Renslayer is knocked unconscious by Sylvie.

After Minutemen arrive to capture her, she prunes herself and reunites with Mobius, who takes her to Loki and other variants of herself in order to make a plan to escape Alioth, a monstrous cloud-like entity which consumes matter.

Upon entering the Citadel at the End of Time, Loki and Sylvie encounter Miss Minutes, who was directly created by the TVA's creator.

She offers them a chance to escape by arranging a deal that would allow them to be placed back on the timeline and live a life where all their desires are fulfilled.

They meet the real creator of the TVA, a man named "He Who Remains" who cannot be killed by Sylvie's efforts because he knows everything that will happen in the future.

In order to enact vengeance for all the suffering the TVA brought upon her and believing He Who Remains to be feinting them, Sylvie kills him, who tells her that he would "see her soon".

Wolfe proclaims that they are all in mortal danger, so Sylvie enchants him, revealing TVA General Dox's actual plan to simultaneously bomb and prune all the branched timelines.

Loki, Mobius, and Sylvie travel to Dox's location and launch an attack to stop her ongoing operation, but most of the branched timelines were destroyed by then, via reset charges and modified TemPads.

Sylvie uses her magic to blast Loki and Timely away as Miss Minutes enlarges herself to scare off the crowds creating chaos.

In the midst of the group's attempts to fix the Loom, Miss Minutes blocks their efforts, causing Sylvie to get trapped in an elevator.

Back in the TVA control room, Sylvie and the others watch on as Loki breaks the Loom and uses his magic to save the branched universes, while a rift opens taking him to the remains of the Citadel at the End of Time.

The look was meant to reflect that "this character [being] on the run... [is] not a comfortable existence" according to Di Martino and exhibited that through her initial disheveled appearance.

[10] She said, "Little things like keeping more of my regional accent, and not trying to sound too posh or too well spoken [were incorporated] because it just wouldn't suit the experience that Sylvie's had.

[37] Writing for IGN, Simon Cardy wrote that Di Martino "play[ed the role] beautifully, bringing a touching sense of humanity" in a scene between her and Hiddleston in "Journey into Mystery".

[43] Brady Langmann of Esquire opined that Di Martino's turn as Sylvie "has already blown far past many of Marvel's depictions of women.

[45] Screen Rant wrote that this was "a real testament to how Marvel can cast a relatively unknown actor and launch them into immediate stardom by way of the MCU".

[47] BBC Culture critic Stephen Kelly called the relationship "some of the most perverse fan fiction the internet has ever seen" when speculating on the future of the show in a review of "The Variant".

[48] Christian P. Haines, a philosopher and assistant English professor at Penn State University, discussed with Gizmodo the implications of the romance, saying that "the question is less, 'does this count as incest', and more 'what would happen if this really basic social rule were loosened?...Would chaos roil the multiverse?

That strikes me as a very Loki proposition: not revolution, really, more an acerbic irony that undermines self-serious assumptions about human nature or what it means to be 'civilized.'

[49] Andi Ortiz of TheWrap wrote that the relationship would be "a little hard to make it work long term" but praised it and Hiddleston and Di Martino's performances: "Loki and Sylvie have...been through a lot... they shared secrets and bared their souls to one another.