Question: Where did the fictional character portrayed in Ragnarok film first appreared?

full_context: Document 1: Valkyrie (Marvel Comics): Valkyrie is a fictional superhero appearing in American comic books published by Marvel Comics. The character was created by Roy Thomas and John Buscema, based on the Norse mythological figure Brynhildr. The character first appeared in "The Avengers" #83 (December 1970) and has become a mainstay of the superhero team known as the Defenders. An Asgardian by birth, Valkyrie, also known by her real name, Brunnhilde, was selected by Odin to lead the Valkyrior. Among her other aliases are Barbara Denton-Norriss, Samantha Parrington, Sian Bowen, and Annabelle Riggs who were all host bodies to the spirit of Brunnhilde. Samantha Parrington, a previous host of Brunnhilde, later received Valkyrie's powers and became a member of the Defenders herself. An ally and one-time love interest of Thor, she was ranked 30th in IGN's list of "The Top 50 Avengers", and 65th in "Comics Buyer's Guide's" "100 Sexiest Women in Comics" list.
Document 2: Thor (film): Thor is a 2011 American superhero film based on the Marvel Comics character of the same name, produced by Marvel Studios and distributed by Paramount Pictures. It is the fourth film in the Marvel Cinematic Universe. The film was directed by Kenneth Branagh, written by Ashley Edward Miller & Zack Stentz and Don Payne, and stars Chris Hemsworth, Natalie Portman, Tom Hiddleston, Stellan Skarsgård, Colm Feore, Ray Stevenson, Idris Elba, Kat Dennings, Rene Russo and Anthony Hopkins. The film sees Thor, the crown prince of Asgard, banished to Earth and stripped of his powers after he reignites a dormant war. As his brother, Loki, plots to take the throne for himself, Thor must prove himself worthy and reclaim his hammer Mjolnir.
Document 3: Thor: The Dark World: Thor: The Dark World is a 2013 American superhero film based on the Marvel Comics character Thor, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. It is the sequel to 2011's "Thor" and the eighth film in the Marvel Cinematic Universe. The film was directed by Alan Taylor, with a screenplay by Christopher Yost and Christopher Markus & Stephen McFeely. It stars Chris Hemsworth, Natalie Portman, Tom Hiddleston, Anthony Hopkins, Stellan Skarsgård, Idris Elba, Christopher Eccleston, Adewale Akinnuoye-Agbaje, Kat Dennings, Ray Stevenson, Zachary Levi, Tadanobu Asano, Jaimie Alexander, and Rene Russo. In "Thor: The Dark World", Thor teams up with Loki to save the Nine Realms from the Dark Elves led by the vengeful Malekith, who intends to plunge the universe into darkness.
Document 4: Hell (DC Comics): Hell (a.k.a. Gehenna, Hades, Hel, Jahannam, Sheol and Tartarus) is a fictional location, an infernal Underworld utilized in titles published by DC Comics. It is the locational antithesis of the Silver City. The DC Comics location known as Hell is based heavily on its depiction in Abrahamic mythology. Aside from a brief appearance in "DC Special Series" #8 (1978) that was never referred to or even mentioned again, the DC Comics concept of Hell was first mentioned in "The Saga of the Swamp Thing" (vol. 2) #25-27 (June-August 1984), described by Alan Moore and was first seen in "Swamp Thing Annual" #2 (1985), both of which were written by Moore and depicted by Stephen Bissette and John Totleben.
Document 5: Hades (DC Comics): Hades (also sometimes referred to as Pluto or Hell) is a fictional character appearing in DC Comics publications and related media, commonly as an adversary and sometimes-ally of the super hero Wonder Woman. Based upon the Greek mythological figure of the same name, he is the Greek god of the dead and ruler of the underworld.
Document 6: Untitled Avengers film: The untitled Avengers film is an upcoming American superhero film based on the Marvel Comics superhero team the Avengers, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. It is intended to be the direct sequel to 2018's "", as well as the sequel to 2012's "Marvel's The Avengers" and 2015's "" and the twenty-second film installment in the Marvel Cinematic Universe (MCU). The film is directed by Anthony and Joe Russo, with a screenplay by Christopher Markus & Stephen McFeely, and features an ensemble cast that includes Robert Downey, Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Benedict Cumberbatch, Evangeline Lilly, Karen Gillan, Anthony Mackie, Tom Holland, Zoe Saldana, Dave Bautista, Paul Bettany, Scarlett Johansson, Jon Favreau, Gwyneth Paltrow, Sebastian Stan, Don Cheadle, and Pom Klementieff.
Document 7: Galactus: Galactus ( ) is a fictional character appearing in American comic books published by Marvel Comics. Formerly a mortal man, Galactus is a cosmic entity who originally consumed planets to sustain his life force, and serves a functional role in the upkeep of the primary Marvel continuity. Galactus was created by Stan Lee and Jack Kirby and first appeared in the comic book "Fantastic Four" #48, published in March 1966.
Document 8: Avengers: Age of Ultron: Avengers: Age of Ultron is a 2015 American superhero film based on the Marvel Comics superhero team the Avengers, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. It is the sequel to 2012's "The Avengers" and the eleventh film in the Marvel Cinematic Universe (MCU). The film was written and directed by Joss Whedon and features an ensemble cast that includes Robert Downey Jr., Chris Hemsworth, Mark Ruffalo, Chris Evans, Scarlett Johansson, Jeremy Renner, Don Cheadle, Aaron Taylor-Johnson, Elizabeth Olsen, Paul Bettany, Cobie Smulders, Anthony Mackie, Hayley Atwell, Idris Elba, Stellan Skarsgård, James Spader, and Samuel L. Jackson. In "Avengers: Age of Ultron", the Avengers fight Ultron, an artificial intelligence obsessed with causing human extinction.
Document 9: Hela (comics): Hela is a fictional character appearing in American comic books published by Marvel Comics. The Asgardian goddess of death is based on the Norse goddess, Hel. The ruler of Hel and Niflheim, the character has been a frequent foe of Thor. Debuting in the Silver Age of comic books, Hela first appeared in "Journey into Mystery" #102 and was adapted from Norse mythology by Stan Lee and Jack Kirby.
Document 10: Avengers: Infinity War: Avengers: Infinity War is an upcoming American superhero film based on the Marvel Comics superhero team the Avengers, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. It is intended to be the sequel to 2012's "Marvel's The Avengers" and 2015's "" and the nineteenth film installment in the Marvel Cinematic Universe (MCU). The film is directed by Anthony and Joe Russo, with a screenplay by Christopher Markus & Stephen McFeely, and features an ensemble cast that includes Robert Downey Jr., Josh Brolin, Mark Ruffalo, Tom Hiddleston, Chris Evans, Chris Hemsworth, Jeremy Renner, Chris Pratt, Elizabeth Olsen, Sebastian Stan, Benedict Cumberbatch, Paul Bettany, Cobie Smulders, Benedict Wong, Zoe Saldana, Karen Gillan, Vin Diesel, Dave Bautista, Bradley Cooper, Pom Klementieff, Scarlett Johansson, Benicio del Toro, Tom Holland, Anthony Mackie, Chadwick Boseman, Danai Gurira, Paul Rudd, and Don Cheadle. In "Avengers: Infinity War", the Avengers join forces with the Guardians of the Galaxy to confront Thanos, who is trying to amass the Infinity Stones.
Document 11: Midgard Serpent (Marvel Comics): Jormungand, also known as The Midgard Serpent or World Serpent, is a fictional character that appears in comic books published by Marvel Comics. The character, based on the serpent Jörmungandr from Norse mythology, first appears in "Marvel Tales" #105 (Feb. 1952), in the period between the Golden Age of Comic Books and the Silver Age of Comic Books.
Document 12: Thor: Ragnarok: Thor: Ragnarok is an upcoming American superhero film based on the Marvel Comics character Thor, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. It is intended to be the sequel to 2011's "Thor" and 2013's "" and the seventeenth film installment of the Marvel Cinematic Universe (MCU). The film is directed by Taika Waititi with a screenplay by Eric Pearson and the writing team of Craig Kyle and Christopher Yost, and stars Chris Hemsworth, Tom Hiddleston, Cate Blanchett, Idris Elba, Jeff Goldblum, Tessa Thompson, Karl Urban, Mark Ruffalo, and Anthony Hopkins. In "Thor: Ragnarok", Thor must defeat the Hulk in a gladiatorial duel in time to save Asgard from Hela and the coming Ragnarök.
Document 13: Hulk (comics): The Hulk is a fictional superhero appearing in American comic books published by Marvel Comics. Created by writer Stan Lee and artist Jack Kirby, the character first appeared in the debut issue of "The Incredible Hulk" (May 1962). In his comic book appearances, the character is both the Hulk, a green-skinned, hulking and muscular humanoid possessing a vast degree of physical strength, and his alter ego Bruce Banner, a physically weak, socially withdrawn, and emotionally reserved physicist, the two existing as personalities independent and resenting of the other.
Document 14: The Avengers (2012 film): Marvel's The Avengers (classified under the name Marvel Avengers Assemble in the United Kingdom and Ireland), or simply The Avengers, is a 2012 American superhero film based on the Marvel Comics superhero team of the same name, produced by Marvel Studios and distributed by Walt Disney Studios Motion Pictures. It is the sixth film in the Marvel Cinematic Universe. The film was written and directed by Joss Whedon and features an ensemble cast that includes Robert Downey Jr., Chris Evans, Mark Ruffalo, Chris Hemsworth, Scarlett Johansson, Jeremy Renner, Tom Hiddleston, Clark Gregg, Cobie Smulders, Stellan Skarsgård, and Samuel L. Jackson. In the film, Nick Fury, director of the peacekeeping organization S.H.I.E.L.D., recruits Iron Man, Captain America, the Hulk, and Thor to form a team that must stop Thor's brother Loki from subjugating Earth.
Document 15: Sif (comics): Sif is a fictional character appearing in American comic books published by Marvel Comics. The character is depicted commonly in association with the superhero Thor. Based on the Norse goddess Sif, she 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. 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. Sif has appeared in various media adaptations of Thor, including the 2011 Marvel Cinematic Universe film "Thor", its 2013 sequel "", and the television series "Agents of S.H.I.E.L.D.", in which she is portrayed by Jaimie Alexander.
ground_truth: Journey into Mystery