List of Marvel Comics characters: J

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Jack-in-the-Box, Jack Mead, first appears in Weapon X: The Draft - Sauron #1. Born an Australian aborigine mutant with telepathy and radar sense, his powers have a side effect where his body becomes petrified and brittle every time he uses them. He is taken into the Weapon X program, believing it to be a superhero team that could fix his mutant side effect, but he is ripped apart by his recruiter, Sauron, after a joke. He survives, becomes placed in a box, and he is utilized as a mind-reader during the admissions process for captured mutants incarcerated in the "Neverland" concentration camp.[1]


For the supervillain formerly known as Jackdaw, see Blackbird (Femizon).

Jackdaw is a fictional character featured in the Marvel Comics universe. He was created by Dez Skinn, Steve Parkhouse, Paul Neary and John Stokes, and first appeared in The Incredible Hulk Weekly #57 (April 1980).

A now-deceased hero, the sidekick of Captain Britain, Jackdaw was an Otherworld elf. Jackdaw had been mortally wounded earlier in his adventures, but was revived by Merlyn and given new powers and a new costume.

He was permanently slain later on Earth-238 by The Fury. Jackdaw was literally torn in half by one of the Fury's energy bolts and expired shortly thereafter in Captain Britain's arms. Jackdaw expressed a belief that Merlyn would resurrect him. Saturnyne had abandoned them (and her assistant Dimples, who loved her deeply) to escape.[2] Merlyn did not resurrect Jackdaw as it would have damaged his chances of rescuing Captain Britain, who was killed as well by the Fury after Dimples and Jackdaw, and resurrected by Merlyn back on Earth-616.[3]

Parnell Jacobs[edit]

Parnell Jacobs is a fictional character from the Marvel Comics universe. He first appeared in Iron Man Vol. 3, #11 (December 1998) by writer Kurt Busiek and artist Sean Chen.

The character subsequently appeared in Iron Man Vol. 3 #12 (January 1999), #14 (March 1999), #18-20 (July–September 1999), Punisher War Journal #17 (May 2008), and War Machine Vol. 2 #1-12 (February 2009-February 2010). Jacobs was also featured in the Marvel MAX series U.S. War Machine by Chuck Austen and the sequel series U.S. War Machine 2.0 by Austen and Christian Moore.

Originally a villainous version of the superhero War Machine, Jacobs became an ally of War Machine and joined his efforts to defeat the Eaglestar Corporation and Norman Osborn.

Parnell Jacobs is an experienced soldier and mercenary trained in armed and unarmed combat. His powered suit of armor grants Super-strength, Supersonic flight at Mach 3, Energy repulsors, a variety of offensive and defensive weapons including missiles and laser blasters, and a tank-like outer shell.


Jaeger is a fictional mutant in the Marvel Comics Universe. His first appearance was in X-Men vol. 2 #100.

The leader, or Jaeger, of the race of supermutants known as Neo, the one known only as Hunter led a strikeforce of Neo in an assault in Nightcrawler's Church of St Michael the Archangel in an effort to set up a beach-head for their war against humans and mutants.[volume & issue needed]

It was Hunter's child who died during the time that the High Evolutionary removed all mutants' powers, and it was this act that caused the Neo to declare their war after the resulting conflict devastated the hidden Neo community.[volume & issue needed]

Their first target was Nightcrawler, who had left the X-Men and was studying to become a priest. He sought out Cecilia Reyes for aid, and together the pair of former X-Men battled Hunter, who was accidentally slain by Cecilia.[volume & issue needed]

The Neo named Rax became Jaeger in his stead, continuing the hunt for the pair of former X-Men.[volume & issue needed]

Jaeger had peak human strength, speed, endurance and reflexes, and extra-human senses enabling him to sense base emotions and track others by trace genetic material.


El Jaguar is a costumed supervillain in the Marvel Universe.

The character, created by Tony Isabella and Bob Brown, first appeared in Daredevil #120 (April 1975).

Within the context of the stories, El Jaguar is a Latin American costumed criminal, who was the head of the Commando Division of HYDRA under Silvermane's New York faction.[4] He was a devoted leader who took pride in leading his troops into battle, until his defeat at the hands Daredevil and Nick Fury’s S.H.I.E.L.D. forces.[5] Years later he attended a meeting with other villains at the “Bar With No Name,” and was slaughtered by the Scourge of the Underworld, along with all the other criminals who attended.[6]

Janus the Nega-Man[edit]

Janus the Nega-Man is a fictional character in the Marvel Universe. He first appeared in Fantastic Four #107 (Feb. 1971), and was created by Stan Lee and Jack Kirby.

Richard Janus was once a college student and a research scientist and contemporary of Reed Richards. He became obsessed with finding a new source of energy, and sought Richards' help to harness this Negative Energy, or Nega-Power. When Richards moved on to new experiments when their investigations bore little fruit, Janus continued his efforts, and eventually discovered his new Nega-Power. After exposure to this power, Janus was split into two separate beings; Janus and the Nega-Man. The belligerent Nega-Man overpowered Janus, and set out to become master of the world. He clashed with the Fantastic Four and developed a module capable of harnessing anti-matter energy, and attempted to cross into the Negative Zone to gain more power. Janus encountered the zone's ruler, Annihilus who easily defeated him in combat and forced him to lead him to Earth. Janus was instead seemingly killed when he was pulled into a matter/anti-matter interface.[7]

Years later, Janus was revealed to have survived the experience and to have faked his death in front of Reed Richards to continue his pursuits. Janus plotted to siphon the power of the Negative Zone, however he was apparently destroyed this time by an energy disruption.[8]

Janus has been identified as one of the 142 registered superheroes who appear on the cover of the comic book Avengers: The Initiative #1.[9]


Jason the Renegade is a fictional character in the Marvel Comics universe. He was created by Peter David and Gary Frank, and first appeared in Incredible Hulk #409.

Jason is a member of the super hero family the Pantheon. Jason often did Agamemnon's dirty work disposing of people who had crossed Agamemnon. Jason defects from the Pantheon when Agamemnon orders him to murder his teammate Ulysses. The task later fell to Pantheon member Achilles. As a result of this Achilles' student Walter Charles takes Ulysses' codename and place within the Pantheon. Shortly before this Walter Charles had stabbed Jason in the eye with the handle of a mop. This causes Jason to lose the eye.

Jason had a daughter with fellow Pantheon member Andromeda named Delphi. When Agamemnon leaves the Pantheon mountain headquarters the Mount, Jason seizes upon the opportunity. He returns via the god-realm Asgard. He does not cross from the mortal realm to Asgard, he comes from Asgard to earth, seemingly defeating Heimdall, the guardian of the Rainbow Bridge, along the way, closing in Agamemnon in the city of Boston. He finds the man in Fenway Park. Agamemnon's current guise of a male teenager causes unsuspecting civilians to try to interfere with the adult Jason. This is noted by the Pantheon member Ulysses, who had forsaken his assigned tasks to take in a BoSox game. The resulting confrontations spill over onto the field itself. A magical portal hidden inside Fenway's 'Green Monster' further interferes with the mission, sucking in many Pantheon members back to Asgard.

Sometime later, Agamemnon reveals the depth of his insanity and tries to destroy the Pantheon. He is captured and tried for his crimes but escapes. He seemingly dies during this incident. Jason is allowed to rejoin the Pantheon, who have set up shop in a new headquarters.

Like his relatives, Jason's endurance, vitality and immortality is derived from comes from a secret deal made between his father and alien beings centuries ago.

Jemiah the Analyzer[edit]

Jemiah the Analyzer is a Celestial in the Marvel Universe. The character, created by Jack Kirby, first appeared in The Eternals #7 (January 1977).

Within the context of the stories, Jemiah is the Celestial tasked with analyzing life-form samples provided by Gammenon the Gatherer and is present during the Fourth Host on Earth.[10][11]

Other versions of Jemiah[edit]

The character has been established as a recurring element in Marvel's in-story cosmology and has appeared in various alternate reality stories and titles such as Earth X and "Living Planet" arc published in Exiles vol. 2, #52 - 53 (November - December 2004).


Jennix is one of the Inheritors, a son of Solus, and brother to Daemos, Verna, Morlun, Karn, Brix and Bora. Like the rest of the Inheritors, Jennix has the ability to drain the life force from other beings through physical contact. Depending on the power of the individual he drains, Jennix's powers and vitality can increase substantially. Jennix's also has superhuman strength, speed, reflexes and durability.[12] Jennix acts as the "brains" of the family and is responsible for the creation of the Master Weaver's shackles enabling the Inheritors to use his powers for their own.[13] He also created the cloning technology of the Inheritors enabling them to cheat death. Unlike his siblings, he spends more of his time doing his experiments housed on Earth-802.[14]

He once tried to clone Spider-Men but failed due to his inability to clone the Spider essence in which he and his kind feasts on.[15] He also was the one who created the technology to spy on various universes and thus claimed that his family mastered this technology centuries ago.[16]

Jennix appears in the mobile game Spider-Man Unlimited (video game) as a boss character.[17]


Jo is a fictional character in the Marvel Comics Universe. Her only appearance was in The Uncanny X-Men #179.

Jo appears with the Morlocks and therefore assumed to be a mutant, although her mutant power is never revealed. She appears only as Kitty Pryde's bridesmaid. Her duty was to make Kitty presentable for the wedding ceremony.[volume & issue needed] Jo always does what others ask and tries to avoid breaking the rules.

Johnny Guitar[edit]

Fred Jones[edit]

Fred Jones is a fictional character in the Marvel Comics Universe. His first appearance was in Sgt. Fury and the Howling Commandos #81.

Fred Jones was a member of the original Howling Commandos and fought alongside them during World War II. Jones was a former All-American quarterback before the War. During an effort to capture Eva Braun, Adolf Hitler's secretary/lover, Cohen lost the lower half of his left leg; however he still managed to obtain plans for a secret assault from Colonel Kritzberg.[volume & issue needed]

Piranha Jones[edit]

Piranha Jones is a supervillain who appears in Marvel Comics, primarily as a foe of Luke Cage.

The character first appeared in Power Man #30, (April, 1976). Ray Jones grew up in poverty and lost all of his teeth by the age of 15. Jones became a criminal at an early age, eventually rising to the level of crime boss. He had his missing teeth replaced with long, sharpened steel spikes. These, and his habit of using them on his enemies, gained him the nickname, "Piranha."

A different version of Piranha Jones appears on season 2 of Avengers: Earth's Mightiest Heroes in the episode "To Steal an Ant Man." this version of Jones has had not just his teeth, but his entire mandible replaced with a mechanical, metal jaw. He is one of the henchmen of gangster William Cross. Jones bites Luke Cage's arm, only to break his teeth on Cage's impervious flesh.


Josette is a fictional mutant in the Marvel Comics Universe. Her first appearance was in Uncanny X-Men #415.

A citizen of the island nation Genosha, Josette is elsewhere visiting relatives when Sentinels destroy her home country. Homeless, Josette is given refuge at the Xavier Institute.{April 2013}

During her stay at the Institute, Josette tries to flirt with Warren Worthington III, but he rejects her. Later that day, Josette meets with and seduces Iceman. Their little romance is cut short when Josette's angry husband Robert, who appears as mud taken humanoid form, attacks and nearly kills Iceman.[volume & issue needed] After Northstar rescues Iceman and defeats Robert,[volume & issue needed] Josette's current whereabouts are unknown.

Josette can read and sense the emotions and feelings of others. She also has the mutant ability to seduce men emphatically. She possesses tentacle-like hair and blue skin with swirls of white pigment.

J'Son of Spartax[edit]

J'son, also known as "Jason of Spartax", is the Emperor of the Spartoi Empire and father of Peter Quill, alias Star-Lord of the Guardians of the Galaxy.[18] The Spartoi are a sister race to the Shi'ar, separating from their cousins millions of year ago.

He was the only son of the previous Emperor Eson, and therefore was Prince and sole heir to the throne. Rejecting his idealism, the ruling Council of Ministers prevented J'son from taking the throne. The future emperor would be educated, as per Spartax tradition, by being brought up on dozens of the Empire's planets working many professions, including servant, miner, poet, soldier and pilot - excelling in the latter two.

When Ronan the Accuser of the Kree Empire forced the Inhuman Royal Family to attempt to assassinate the Empress Lilandra, ruler of the neighboring Shi'ar Empire during a wedding ceremony that would symbolically unite the Shi'ar and Spartoi, J'son (who had been seen with the Inhumans) was accused of being part of the plot. For this, he was banished and deemed unworthy of the throne.

However, J'son would later be summoned by his father when war broke out between the Spartoi and the Ariguans. On his way back home, he was forced to crash land on Earth, where he fell in love with a human woman named Meredith Quill. The two began a short relationship before J'son was forced to leave to wage war for Spartax. Wishing to shield Meredith from the pain of his departure, J'son erased her memories of him, without knowing that the two had conceived a child. Meredith would later go on to give birth to his son, Peter Quill.

J'son would eventually go on take his father's place as emperor. J'son later met his son after Peter had become Star-Lord, and offered him a place as heir to the throne. Peter refused, and in his stead J'son adopted Kip Holm as future heir.

Years later, J'son joined other members of the Galactic Council to declare the Earth off-limits to extraterrestrial interaction. Once his son defended Earth from a Badoon attack, J'son sent Spartoi soldiers to capture him and his team of Guardians. However, the Guardians managed to escape and flee.

In an attempt to finally get rid of the Guardians and make his son join him, all of the Guardians were separately dealt with by the Spartoi and its allies. However, they didn't count with the Guardians' ally Captain Marvel, who saved Peter Quill from J'son and the Spartoi Empire. As he was escaping, Quill discredited J'son to the whole empire, revealing him as a heartless murderer. The entire Spartoi Empire rebelled against J'son, who was forced to flee.

With no longer an empire or fortune, J'son became the villain known as Mister Knife, and started building a criminal empire. He put a bounty on his son, and also assembled the Slaughter Squad to recover the Black Vortex.

Because of the price put on his head, Star-Lord began raiding Mister Knife's crime syndicate, unaware that he was dealing with his own father. After the Slaughter Squad managed to finally capture Star-Lord while he was on a date with Kitty Pryde, Mister Knife revealed his identity to his son.

After Peter escaped with the help of Kitty Pryde, who travelled all the way from Earth to save him, J'son tracked down to a planet the son of Thanos, Thane, and convinced him to join his cause.

After Star-Lord and Kitty Pryde decided to steal the Black Vortex from J'son with the sole purpose to annoy him, Mister Knife sent the Slaughter Lords to hunt them down and recover the Vortex. After numerous failed attempts to recover the Vortex, Mister Knife managed to get his hands on it. As part of a deal with Thane, the son of Thanos submitted to the Black Vortex and used his cosmically enhanced power to encase the entirety of Spartax in his amber construct. The trapped Spartax was later traded to the Brood by Mister Knife, in exchange for taking advantage of their expansion and acquiring one planet for every ten worlds they conquered ever since.

At a moment when Captain Marvel retrieved the Black Vortex, she was cornered by Thane and J'son, who demanded she give them the Vortex back. When Thane tried to use his powers to encase Carol in amber, she used the Black Vortex as a shield and deflected the attack towards J'son.

J'son remained encased in the amber construct floating through Spartax's orbit, until he was found by the Collector, who was too late to recover the Vortex, but settled for adding J'son to his collection.

  • Emperor Eson may be an avatar or incarnation of Eson the Searcher, since J'Son's red and gold uniform has similar patterns to the Celestial Eson's armor.[19] In the film, it is hinted that J'Son sent Yondu and his space pirates to find the young Peter Quill — they comment that they're glad they didn't reunite on the basis that Peter's father was "a jackass," likely referring to J'son being a villain.[20]


Jumbo Carnation[edit]

Jumbo Carnation is a fictional mutant in the Marvel Comics Universe. His first appearance was in New X-Men #134.

Jumbo was a famous mutant fashion designer who created fashions fit for and inspired by the various and inhuman forms of himself and other mutants. One night, Jumbo was jumped by a group of anti-mutant thugs. Despite his injuries, he dies from an overdose of the mutant-enhancing drug called Kick. He expires on a city sidewalk.[volume & issue needed]

Although his role was minimal, Carnation would have a substantial impact in the pages of New X-Men. His death galvanized Quentin Quire, a troubled student at Xavier's School for Gifted Youngsters, into progressively destructive behavior as he believed that Carnation had been murdered by racists.[volume & issue needed] The investigation conducted by the X-Men themselves (an act covered by the news) would reveal the role the drug played. Quire's gang, also affected by the drug, would go on to attack the people he thought responsible for the murder.[volume & issue needed] All this would culminate in Quire's kidnapping of Charles Xavier and inciting a riot on the school grounds.[volume & issue needed] This riot led to the death of two innocent students: Sophie of the Stepford Cuckoos and Dummy of the Special Class.[volume & issue needed]

Jumbo has multiple arms, and can change his skin into a teflon state.


  1. ^ Weapon X Vol.2 #5
  2. ^ Marvel Super-Heroes (July 1982)#387
  3. ^ ComicVine explanation
  4. ^ Tony Isabella (w), Bob Brown (p), Vince Colletta (i). "And a HYDRA New Year!" Daredevil 120 (April 1975), Marvel Comics
  5. ^ Tony Isabella (w), Bob Brown (p), Vince Colletta (i). "Holocaust In the Halls of HYDRA!" Daredevil 123 (July 1975), Marvel Comics
  6. ^ Mark Gruenwald (w), Paul Neary (p), Dennis Janke (i). "Overkill" Captain America 319 (July 1986), Marvel Comics
  7. ^ Fantastic Four Vol. 1 #107-108 (1971)
  8. ^ Fantastic Four Vol. 3 #40, 43-44 (2001)
  9. ^ Avengers: The Initiative #1 Character Map
  10. ^ Jack Kirby (w), Jack Kirby (p), John Verpoorten (i). "The Fourth Host" The Eternals 7 (January 1977)
  11. ^ Mark Gruenwald, Ralph Macchio (w), Keith Pollard (p), Gene Day (i). "Chapter One Twilight of the Gods!" Thor 300 (October 1980), Marvel Comics
  12. ^ Amazing Spider-Man Vol. 3 #9
  13. ^ The Superior Spider-Man #33
  14. ^ Scarlet Spiders #1
  15. ^ Scarlet Spiders #2
  16. ^ Amazing Spider-Man Vol. 3 #11
  17. ^
  18. ^ Jason of Sparta
  19. ^ Eson the searcher
  20. ^ Star Lord's father