Question: The Guardians of the Galaxy, are a fictional spacefaring superhero team, appearing in American comic books published by Marvel Comics, it has an an initial roster, including which  fictional superhero appearing in American comic books published by Marvel Comics, where the character first appeared in "Tales to Astonish" #13 (November 1960)? 

Context articles: Guardians of the Galaxy (2008 team)
Rockman (comics)
Gamora
Black Widow (Natasha Romanova)
Doctor Strange
Northstar
Hank Pym
Groot
Valkyrie (Marvel Comics)
Carol Danvers

The Guardians of the Galaxy are a fictional spacefaring superhero team appearing in American comic books published by Marvel Comics.
 Dan Abnett and Andy Lanning formed the team from existing and previously unrelated characters created by a variety of writers and artists, with an initial roster of Star-Lord, Rocket Raccoon, Quasar, Adam Warlock, Gamora, Drax the Destroyer and Groot.
Rockman is a fictional superhero appearing in American comic books published by Marvel Comics.
 The character first appeared in "U.S.A. Comics" #1 (August 1941), published by Marvel predecessor Timely Comics during the 1930s to 1940s period historians and fans call the Golden Age of Comics.
 As credits were not routinely given in comic books of this period, his writer and artist co-creators are unknown, although the first page of his debut story was drawn by Charles Nicholas (itself a house pen name) and the remainder by Basil Wolverton.
Gamora Zen Whoberi Ben Titan ( ) is a fictional character appearing in American comic books published by Marvel Comics.
 Created by Jim Starlin, the character first appeared in "Strange Tales" #180 (June 1975).
 Gamora is the adopted daughter of Thanos, and the last of her species.
 Her powers include superhuman strength and agility and an accelerated healing factor.
 She also is an elite combatant, being able to best most of the opponents in the galaxy.
 She is a member of the group known as the Infinity Watch.
 The character played a role in the 2007 crossover comic book event "", and became a member of the titular team in its spin-off comic, "Guardians of the Galaxy".
 She has been featured in a variety of associated Marvel merchandise.
 Zoe Saldana plays the character in the 2014 live-action film "Guardians of the Galaxy" and its sequel "Guardians of the Galaxy Vol.
 2".
Black Widow (Russian: Чёрная вдова , transliterated "Chyornaya Vdova") (Natalia Alianovna "Natasha" Romanova, Russian: Наталья Альяновна "Наташа" Романова, also known as Natasha Romanoff) is a fictional superhero appearing in American comic books published by Marvel Comics.
 Created by editor and plotter Stan Lee, scripter Don Rico, and artist Don Heck, the character first appeared in "Tales of Suspense" No. 52 (April 1964).
 The character was first introduced as a Russian spy, an antagonist of the superhero Iron Man.
 She later defected to the United States, becoming an agent of the fictional spy agency S.H.I.E.L.D., and a member of the superhero team the Avengers.
Doctor Stephen Vincent Strange, M.D., is a fictional superhero appearing in American comic books published by Marvel Comics.
 Created by artist Steve Ditko and writer Stan Lee, the character first appeared in "Strange Tales" #110 (cover-dated July 1963).
 Doctor Strange serves as the Sorcerer Supreme, the primary protector of Earth against magical and mystical threats.
 Inspired by stories of black magic and "Chandu the Magician", Strange was created during the Silver Age of Comic Books to bring a different kind of character and themes of mysticism to Marvel Comics.
Northstar (French: "Ėtoile Nord" ) (Jean-Paul Beaubier) is a fictional superhero appearing in American comic books published by Marvel Comics.
 Created by Chris Claremont and John Byrne, the character first appeared in "X-Men" #120 (April 1979) as a member of the fictional Canadian superhero team, Alpha Flight.
Dr. Henry "Hank" Pym is a fictional character appearing in American comic books published by Marvel Comics.
 Created by editor and plotter Stan Lee, scripter Larry Lieber and penciler Jack Kirby, the character first appeared in "Tales to Astonish" #27 (Jan. 1962).
 The character, a scientist that debuted in a standalone science-fiction anthology story, returned several issues later as the original iteration of the superhero Ant-Man with the power to shrink to the size of an insect.
 Alongside his crime-fighting partner/wife Janet van Dyne, he goes on to assume other superhero identities, including the size-changing Giant-Man and Goliath; the insect-themed Yellowjacket; and briefly the Wasp.
 He is a founding member of the superhero team the Avengers.
Groot ( ) is a fictional superhero appearing in American comic books published by Marvel Comics.
 Created by Stan Lee, Jack Kirby, Larry Lieber, and Dick Ayers, the character first appeared in "Tales to Astonish" #13 (November 1960).
 An extraterrestrial, sentient tree-like creature, the original Groot first appeared as an invader that intended to capture humans for experimentation.
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.
Carol Danvers is a fictional superhero appearing in American comic books published by Marvel Comics.
 Created by writer Roy Thomas and designed by artist Gene Colan, Major Carol Danvers first appeared as a member of the United States Air Force in "Marvel Super-Heroes" #13 (March 1968) and debuted as the first incarnation of Ms. Marvel in "Ms. Marvel" #1 (January 1977) after a fusion of alien Kree and human genes gives her superhuman powers, which occurred in "Captain Marvel" #18 (November 1969).
 Debuting in the Silver Age of comics, the character was featured in a self-titled series in the late 1970s before becoming associated with superhero teams the Avengers and the X-Men.
 The character has also been known as Binary, Warbird, and Captain Marvel at various points in her history, and has been featured in other Marvel licensed products including video games, animated television series, and merchandise such as trading cards.