Question: Khn'nr is a fictional alien character, who has appeared in numerous comic book series, he is a Skrull sleeper agent posing as the Kree Captain Mar-Vell, also known as Captain Marvel, the name of several fictional superheroes appearing in American comic books, published by which organization?

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Ms. Marvel: Ms. Marvel is the name of several fictional superheroes appearing in comic books published by Marvel Comics.  The character was originally conceived as a female counterpart to Captain Marvel.  Like Captain Marvel, most of the bearers of the Ms. Marvel title gain their powers through Kree technology or genetics.  Marvel has published four ongoing comic series titled "Ms. Marvel", with the first two starring Carol Danvers, and the third and fourth starring Kamala Khan.

Captain Marvel (Marvel Comics): Captain Marvel is the name of several fictional superheroes appearing in American comic books published by Marvel Comics.  Most of these versions exist in Marvel's main shared universe, known as the Marvel Universe.

Carol Danvers: 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.

Robin (character): Robin is the name of several fictional superheroes appearing in American comic books published by DC Comics.  The character was originally created by Bob Kane, Bill Finger, and Jerry Robinson, to serve as a junior counterpart to the superhero Batman.  The character's first incarnation, Dick Grayson, debuted in "Detective Comics" #38 (April 1940).  Conceived as a vehicle to attract young readership, Robin garnered overwhelmingly positive critical reception, doubling the sales of the Batman related comic books.  The early adventures of Robin included "Star Spangled Comics" #65–130 (1947–1952), which was the character's first solo feature.  Robin made regular appearances in Batman related comic books and other DC Comics publications from 1940 through the early 1980s until the character set aside the Robin identity and became the independent superhero Nightwing.  The team of Batman and Robin has commonly been referred to as the "Caped Crusaders" or "Dynamic Duo".

Vision (Marvel Comics): The Vision is the name of several fictional superheroes appearing in American comic books published by Marvel Comics.  The first iteration, created by Joe Simon and Jack Kirby, was an alien who first appeared in "Marvel Mystery Comics" #13 (November 1940).  The second iteration, by Roy Thomas, Stan Lee and John Buscema, was an android and a member of the Avengers who first appeared in "The Avengers" #57 (October 1968).  The third Vision is a time traveler who fused with the second version's operating system.  The character is portrayed by Paul Bettany in the 2015 film "" and the 2016 film "".

Genis-Vell: Genis-Vell, also known as Legacy, Captain Marvel, and Photon, is a fictional superhero turned supervillain appearing in American comic books published by Marvel Comics.  He is depicted as the son of Mar-Vell of the extraterrestrial Kree Empire, who was the first character to be known as Captain Marvel in the Marvel Universe.  Genis-Vell would become the third to carry the name.

Superboy: Superboy is the name of several fictional superheroes appearing in American comic books published by DC Comics.  These characters have been featured in five "Superboy" comic book series.  For many years, Kon-El has been the Superboy in DC Comics continuity, with Jonathan Kent taking the role in 2016.

Captain Marvel (Khn'nr): Khn'nr is a fictional alien character who has appeared in numerous comic book series published by Marvel Comics.  He is a Skrull sleeper agent posing as the Kree Captain Mar-Vell (also known as Captain Marvel).

Doctor Minerva: Doctor Minerva is a fictional character appearing in American comic books published by Marvel Comics.  Doctor Minerva is a Kree geneticist.  She was an enemy of the rogue Kree agent Captain Mar-Vell, and later became the partner of Captain Atlas.

Citizen V: Citizen V is the codename of several fictional superheroes appearing in American comic books published by Marvel Comics.  The original incarnation was an obscure hero from the Golden Age of Comic Books, but the character's identity was revived in the modern day in the pages of "Thunderbolts".  The various incarnations of the character have usually been affiliated with the V-Battalion organization.  The "V" in the character's and group's name is the letter "V" - as opposed to the Roman numeral 5 - and is derived from the World War II-era slogan "V for Victory".

Supporting paragraphs: Captain Marvel (Khn'nr) Captain Marvel (Marvel Comics)
Answer: Marvel Comics