|First appearance||Journey into Mystery #102 (Mar 1964)|
|Created by||Stan Lee and Jack Kirby|
|Place of origin||Asgard|
|Abilities||Asgardian racial abilities|
Sif is a fictional character appearing in comic books published by Marvel Comics, in particular those featuring Thor. Based on the mythological being of the same name, Sif was created by Stan Lee and Jack Kirby and first appeared in Journey Into Mystery #102 (March 1964). As an Asgardian warrior and lover of Thor, Sif often accompanies Thor into battle and spends much of her time worrying about and searching for him. She has also battled alongside Balder, who has developed an unrequited attraction to her, as she never shows affection for anyone but Thor and certain individuals who have proved worthy to wield his hammer, Mjolnir, such as the noble alien warrior, Beta Ray Bill and the mortal Eric Masterson.
Publication history 
Sif, created by Stan Lee and Jack Kirby, first appeared in Journey Into Mystery #102 (March 1964). As a supporting character of Thor, Sif was featured predominately through the pages of The Mighty Thor, beginning with issue #136 (January 1967). The character went on to make guest appearances in several series including The Avengers, Fantastic Four, The New Mutants, Silver Surfer and Thunderstrike.
In June 2010, Sif starred in a self titled one-shot by writer Kelly Sue DeConnick and artist Ryan Stegman. The issue deals with the aftermath of Loki having taken control of her body and her consciousness being forced into the frame of a dying elderly woman. Deconnick said, "Well, this is pretty much the story of how she deals with that. She was a bit cowed at first and, for a woman as fierce and proud as Sif, that's insult added to injury. This is the story of how she comes to own that fury and rises to her full stature once again."
Beginning with issue #646 (November 2012), Journey into Mystery by Kathryn Immonen and Valerio Schiti shifted focus from Loki to Sif. Editor Lauren Sankovitch said, "We had it Loki-centric... going forward with #646 we wanted to mix it up a little bit. Sif’s been in the thick of it, she’s a born warrior, she’s got a lot of fight and verve and fire to her! We talked at length about what this story could be and what her story could be, and it all came down to...one single question: what does she want? I think Sif, above all, wants to be a better warrior."
Fictional character biography 
Early life 
Sif, the sister of Heimdall, has been the constant companion of Thor and Balder since childhood. Like most Asgardians, Sif was born with golden hair. Hers, however, was turned black after Loki jealously cut it and replaced it with enchanted hair made by dwarves. At an early age she showed great prowess as a warrior and was considered the best female warrior of all of Asgard, matched only by Brunnhilde. At one point she was given to the death goddess Hela by a giant in exchange for immortality, but Thor saved her by offering himself in her place. Hela was so impressed that she let them both go.
Life as a warrior 
Sif and Thor are separated when he is banished from Asgard by his father Odin and begins a life as a superhero on Earth. Many years later Thor becomes romantically involved with Jane Foster. Thor brings Jane to Asgard to be wed, where she is granted immortality but after she fails a final test Odin sends her back to Earth, stripped of her newly acquired powers and without memories of the event. Odin then arranges an encounter with Sif while Thor is battling the monstrous super-strong Unknown, and the two fall in love again.
Reunited with Thor, Sif accompanies him into battle against many of his most formidable enemies including Ulik, the Enchanters Three, the Circus of Crime, Wrecker, Mangog, Pluto, and Surtur. Sif is part of the resistance when Loki takes control of Asgard. After Hogun the Grim attempts a physical attack, Sif puts herself in the line of fire and convinces Loki if he dies, he would have to kill her too. Loki declines to murder anyone at that point. Sif is one of the Asgardians that encounter Tana Nile, leading to a series of adventures with her that gets them exiled from Asgard for a time, but they eventually return home. Sif discovers that Thor still has feelings for Jane Foster, when she finds him at her hospital bedside after Jane has been critically injured. Despite this Sif chooses to save Jane's life by merging her life force with her own. Sif does this partially so that she could try to understand Thor's attraction to mortals, especially Jane Foster. Sif is soon separated from Jane and Jane is exiled to a pocket dimension only accessible through the Possessor's runestaff. Eventually, Sif and Thor rescue Jane and reunite her with her mortal love, Dr. Kevin Kincaid. Red Norvell when gaining the power of Thor thanks to Loki, does so as he is attracted to Sif, and kidnaps her, although she convinces him to return and save Asgard from Ragnarok. Later she breaks a deadlock of votes, allowing Thor to return to Earth.
Later the alien warrior Beta Ray Bill comes to the defense of Earth during a war with Surtur and his demon army. In the midst of battle Sif and Bill find themselves attracted to each other. Meanwhile Lorelei had given Thor an elixir that caused him to fall in love with her and so blinded by the spell that he even struck Sif in anger. When the war is over Sif and Bill spend some time on Earth exploring their mutual attraction before returning to Asgard. Sif eventually returns and finally comes to forgive Thor, after she realizes that Lorelei was to blame for his brutality. However, she clarifies to Balder that her love for Bill is purely platonic.
She also develops a romantic relationship with another mortal to wield Thor's power, Eric Masterson. Despite this, Sif risks her life to travel to the realm of Mephisto to free what seems to be the soul of Thor from a mystical bag, she pledges her loyalty to the demonic entity. She is manipulated into a new costume change and is sent to face down Eric and Balder in battle, they had willingly followed her, worried for the success of her mission. Eric and Sif eventually part realms as friends, but he leaves her with a favored leather jacket.
The Reigning 
When Thor assumes the throne of Asgard following Odin's death, he becomes torn between his duties as king and his desire to keep mortals from harm. Thor resolves this by bringing Asgard to Earth and reshapes the world in his image. Though his intentions are noble a nightmarish future follows as Thor's reign on Earth becomes tyrannical. Sif, unwilling to go along with this new vision is exiled from Asgard. Thor eventually marries the Enchantress and has a son, Magni. As an adult, Magni seeking understanding of these events finds Sif who influences him to rise up against his father even though it is apparent that she is still in love with him. Following Magni's death in a battle involving Thor, Thor Girl and Desak, Thor sees the error of his ways and travels back in time to undo what he has done.
After the timeline is reset Loki brings about Ragnarök in Asgard during which the godly forces swiftly lose ground. Sif survives the first wave of losses but personally loses an arm. She is rescued by Brunnhilde, who is later killed by Durok the Demolisher. Sif honors Brunnhilde's death by taking her sword and leading the Valkyrior in the final battle. Sif falls in battle against Surtur's forces, dying side by side with Volstagg. The entirety of Asgard is ended soon after.
Thor returns in time and restores the pantheon, beginning with Heimdall. After resurrecting the rest of the gods, Donald Blake goes to a hospital to try to find the reborn Sif. After wrongly thinking that she was reborn in Donald Blake's former love, Jane Foster, he leaves thinking that Sif won't come back. However, after that scene, it is revealed that Sif was reborn in an elderly woman named Mrs. Chambers, who is suffering from what is thought to be terminal cancer in that hospital. Loki has masked her from Thor's abilities, giving her a mirror that shows Sif her true form, but unable to let anyone know who she is. Her host remains in the hospital, fighting for her life. Thor himself wondered what would happen to the spirit of an Asgardian if their host died.
Loki later revealed to Thor about what had happened to Sif and advises him to find Sif before Loki returns to his true form. Upon learning the truth from Mrs. Chambers, Jane Foster calls Donald Blake and informs him that she has found Sif, with Thor successfully being able to restore her. With Sif resurrected, Mrs. Chambers passes away. Sif then joins Thor in exile in Broxton, Oklahoma and checks into the same hotel as Donald Blake under the name Sylvan. While in Broxton, Sif struggles with the fact that her body was possessed by Loki while she herself was trapped in the body of Mrs. Chambers and comes to the aid of Beta Ray Bill whose starship, Skuttlebutt, has been invaded by virus infected aliens. Sif is later seen defending Asgard during the Siege of Asgard and the Serpent's War.
Powers and abilities 
Sif shares powers common among all Asgardians including enhanced strength, durability and longevity (through the consumption of golden apples). She is also highly skilled in hand to hand combat and proficient in use of cold weapons.
In early appearances, Sif also possessed the innate ability to teleport herself and others from Earth to Asgard. But at some point, Sif began relying on her enchanted sword, which could "cleave" open gateways to other destinations besides Earth and Asgard through a complex array of swinging motions. However, during The Reigning, after Thor failed to truly resurrect a young girl, Sif was once again able to teleport herself and Thor away without the use of her sword.[volume & issue needed]
Other versions 
Earth X 
In the alternate Earth X reality, the Asgardians were actually aliens that were manipulated by the Celestials into believing they were the Gods of Norse myth. When the lie was revealed, "Sif" and the other Asgardians briefly resumed their alien form, but later returned to their Asgardian forms.
Guardians of the Galaxy 
Sif has an alternate, older, version of herself living in the MC2 universe. However, she had to flee away from her home-world on Asgard when the planet devourer Galactus arrived to eat their home, as seen in the Last Planet Standing miniseries.[volume & issue needed]
Mutant X 
In other media 
- Sif appears in The Super Hero Squad Show episode "Oh Brother!", voiced by Tricia Helfer. She gets Thor, Wolverine, Reptil, and Falcon to help her stop Loki's army.
- Sif appears in The Avengers: Earth's Mightiest Heroes, voiced by Nika Futterman. She is first introduced in the episode "Thor the Mighty".
- Sif appears in the animated direct-to-video film Hulk vs. Thor voiced by Grey DeLisle. She is tasked by Thor to defend Odin during his Odinsleep while Thor battles the Hulk.
- Sif also appears in the animated Marvel movie Thor: Tales of Asgard. She is voiced by Tara Strong.
- Sif is portrayed by actress Jaimie Alexander in the 2011 live-action film, Thor.
- Jaimie Alexander is scheduled to reprise her role in Thor: The Dark World.
Video games 
- Sif makes an appearance as a non-playable character in Marvel: Ultimate Alliance, voiced by Adrienne Barbeau.
- Sif appeared in Thor: God of Thunder (based on the live-action film), voiced by Jaimie Alexander.
- Sif is a playable character in the Facebook game Marvel: Avengers Alliance.
Motion comics 
- Sif appears in a four episode motion comic titled Thor & Loki: Blood Brothers, based on the graphic novel, Loki by Robert Rodi and Esad Ribic. She is voiced by Elizabeth Diennet.
- Sif is the 172nd figurine in The Classic Marvel Figurine Collection.
- A figure of Sif will be released in the Marvel Minimates line, in the first TRU wave based on the film Thor.
- Sif in her classic attire was released in the Battle in the Frozen Land 3-pack from the Marvel Super Hero Squad line, packaged with figures of Thor and a Frost Giant.
- A figure of Sif will be released in Hasbro's 3.75" Thor: The Mighty Avenger movie tie-in line.
- Dietsch, TJ (25 February 2010). "Sif's Revenge". Marvel.com. Retrieved 6 December 2012.
- Campbell, Josie (14 August 2012). "Immonen Leads Sif On A "Journey Into Mystery"". Comic Book Resources. Retrieved 14 August 2012.
- Thor: Son of Asgard #3 (June 2004)
- Thor: Son of Asgard #1 (May 2004)
- Thor: Son of Asgard #8 (Nov. 2004)
- Thor: Son of Asgard #10-12 (Jan. - Mar. 2005)
- Thor #136 (Jan. 1967)
- Thor #137-140 (Feb. - May 1967)
- Thor #143-145 (Aug. - Oct. 1967)
- Thor #145-147 (Oct. - Dec. 1967)
- Thor #148-150 (Jan. - Mar. 1968)
- Thor #154-157 (July - Oct. 1968)
- Thor #163-164 (Apr. - May 1969)
- Thor #176-177 (May - June 1970)
- Thor Vol 1 #192 (September 1971)
- Thor #201-221 (July 1972 - Mar. 1974)
- Thor #231 (Jan. 1975)
- Thor #236 (June 1975)
- Thor #249 (July 1976)
- Thor #334-335 (Aug. - Sept. 1983)
- Thor #274-276 (Aug. - Oct. 1978)
- Thor #313 (Nov. 1981)
- Thor #349-359 (Nov. 1984 - Sept. 1985)
- "Thor" #442 (Jan. 1992)
- Thor #450-455 (Aug. - Dec. 1992)
- Thor vol. 2, #41-74 (Nov. 2001 - Apr. 2004)
- Thor vol. 2, #75 (May 2004)
- Thor vol. 2, #79 (July 2004)
- Thor vol. 2, #80 (Aug. 2004)
- Thor vol. 2, #82 (Sept. 2004)
- Thor vol. 2, #83 (Oct. 2004)
- Thor vol. 2, #85 (Dec. 2004)
- Thor vol. 3, #1-5 (Sept. 2007 - Jan. 2008)
- Thor Vol. 3, #8 (June 2008)
- Thor #601 (June 2009)
- Thor #602(Aug. 2009)
- Thor #603 (Nov. 2009)
- Sif #1 (June 2010)
- Callahan, Timothy (April 21, 2010). "Review: Sif #1". Comic Book Resources. Retrieved September 29, 2010.
- Siege #2 (Apr. 2010)
- Fear Itself #1 (June 2011)
- Thor #234 (Apr. 1975)
- Earth X #12 (Apr. 2000)
- Guardians of the Galaxy #42 (Nov. 1993)
- Mutant X Annual #2001 (May 2001)
- Comics Continuum
- Mel Valentin (January 28, 2009). "Movie Review - Hulk Vs.". efilmcritic.com. Retrieved September 8, 2010.
- George 'El Guapo' Roush (2009-09-22). "Thor, Iron Man And The Fighter Are Facebook Friends With David Fincher". Latino Review. Retrieved 2009-09-23.
- Wigler, Josh (2012-01-11). "Jamie Alexander Teases 'Thor 2' Romance, Possible 'Avengers' Appearance". MTV News. Archived from the original on 2012-01-11. Retrieved 2012-01-11. "I've had few discussions about Thor 2. I'm definitely going to be a part of it so that will be fun. And we just got Alan Taylor from Game of Thrones to direct so we're really excited. I'm excited to see what he brings."
- "Q&A - Thor's Jaimie Alexander on Marvel Spoilers, Her Geeky Roots, and Wonder Woman's Breasts". FilmCritic.com. 2011-05-04. Retrieved 2011-05-08.
- "Thor & Loki: Blood Brothers Premieres March 28". marvel.com. 2011-03-11. Retrieved 2011-03-11.
- Sif at the Marvel Universe wiki