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"And you are?"
"Negasonic Teenage Warhead."
"Negasonic Teenage... What the shit?! That's the coolest name ever!"
Deadpool and Negasonic Teenage Warhead[src]

Negasonic Teenage Warhead (born Ellie Phimister[1]) is a mutant and a member of the X-Men, formerly under the tutelage of Colossus. She possess the mutant ability to detonate atomic bursts from her body.



"And you chicken noodle, "nothing compares to you". Sinéad O'Connor, 1990. Sorry."
"It's all right. You're cool."
―Deadpool and Negasonic Teenage Warhead[src]

After spotting Deadpool on the news, Colossus took Negasonic Teenage Warhead with him in an attempt to convince the mercenary into joining the X-Men. However, Deadpool declined and ended up fleeing from the mutants. Later, the mercenary would enlist the two mutants' help in saving Vanessa Carlysle and defeating Ajax. During the ensuing fight, Negasonic Teenage Warhead used her powers to take out multiple soldiers and save Colossus from getting strangled by Angel Dust. At the battle's conclusion, Negasonic Teenage Warhead, after acknowledging a reference from Deadpool, left the area with Colossus as the mercenary reunited with Vanessa.

Deadpool 2

Negasonic Teenage Warhead was at the X-Mansion with fellow X-Man and girlfriend Yukio when Colossus brought Deadpool there to recover after the latter blew himself up. When Colossus convinced Deadpool to join the X-Men, she joined them on a mission to stop a mutant causing trouble at the Essex House for Mutant Rehabilitation. During the mission, Deadpool managed to talk the young mutant, Russell Collins, down but then proceeded to kill some of the orphanage's staff when he learned that they were abusing Russell. Deadpool and Russell were subsequently arrested and sent to the Ice Box.

Negasonic with Yukio

Colossus, Negasonic and Yukio later travelled to the Essex House to back up Deadpool, Cable, and Domino in taking on Juggernaut. Negasonic and Yukio helped to evacuate the children from the orphanage, then assisted Colossus in taking down Juggernaut.

Sometime after, Negasonic and Yukio repaired Cable's time travel device and gave it to Deadpool, allowing him to travel though time to save Vanessa Carlysle and Peter. He also used it to kill an earlier incarnation of himself and Ryan Reynolds before he made Green Lantern. However, they both realize that they may have made a terrible mistake.

The Westchester Incident

In 2028, Charles Xavier developed Alzheimer's and suffered a massive seizure that injured 600 people, and killed 7 mutants, including several members of the X-Men. It is unknown if Negasonic Teenage Warhead was among those who were either killed or injured.


"LOOK! I'm a teenage girl, I'd rather be anywhere than here! I'm all about long sullen silences, followed by mean comments, followed by more silence!"
―Deadpool to Negasonic Teenage Warhead[src]

Negasonic is portrayed as a calm, snarky, sarcastic, unmotivated, antisocial, yet good humored and patient teenager, even her outrageous mutant name is a good indicator of how little she cares about what anybody thinks of her. Whilst Deadpool seems to expect her to be a stereotypically angst teenager, which she does not deny, she is shown to possess a genuine heroic personality.


Negasonic can also be somewhat rude, as she isn't afraid to insult people whom she doesn't like, especially Deadpool, such as calling him "Douchepool" when she tried to tell him that Ajax got away, and "old" due to him referencing Alien 3. She would even take a moment to write a Twitter post on her phone right at the start of a battle. Despite being somewhat moody at first, Negasonic is entertained by Deadpool's feeble attempts to hurt Colossus, giggling as he fails to do so. She does eventually warm up to Deadpool, calling him "cool" after they defeated Ajax and successfully saved Vanessa Carlysle. Negasonic can also be very decisive in combat, not hesitating to attack Angel Dust, providing Deadpool with the means to reach Ajax, and saving Colossus in time.

Negasonic appears to possess a close relationship with her mentor, Colossus. Whilst she seems to dislike his gentle, hard-working, and serious nature, Negasonic does not undermine or argue against him. A further testament of their close relationship, is that Negasonic almost risks herself to save Colossus as she renders herself unconscious using all her power to save him, despite the risk of collateral damage killing her.

Powers and Abilities


"Oh I so pity the dude that pressures her into prom sex."
Deadpool, after seeing Negasonic's powers being used to blast away Angel Dust.[src]
  • Nuclear Detonation: Negasonic Teenage Warhead possesses the ability to generate explosions from her body of varying degrees. At lower levels, she can send a car flying away, crushing two enemies. At higher power levels, she was able to level an entire scrapyard and destroy a grounded helicarrier. Negasonic can infuse the explosions she creates with her physical combat. She can use her powers in conjunction with a full body charge to attack superhumanly strong opponents such as Angel Dust. She can also use her explosive powers to cause a downward explosion capable of launching herself high into the air. She can also control the kinetic force spectrum, and energy field of her explosions, allowing her to create a concussive forcefield that shielded her from Firefist’s attacks.
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  • Energy Field Bomb/Concussive Force Generation: Ellie possesses the ability to generate thermo-chemical energy from her explosions and release it from her body to use it as a concussive bomb. This energy is used as thrust to cause her body to be propelled through the air, at great heights and speeds. She can also use this energy field in order to detonate her surroundings from her own bodily thermals. The energy can also be used to heat up other object in her proximity to a melting point, while she is charging up for an explosive bomb. Her power can also be used in order to create her own concussive force from her body, allowing her to strike opponents with extreme explosive force.


  • Skilled Engineer: Negasonic was able to fix Cable’s futuristic time travel device, however she instantly regretted it after Deadpool took it.





  • Unlike other characters in the Marvel Comics, Negasonic Teenage Warhead is a character not born in a real location. She was from Genosha.
  • Due to the popularity of her character in the movie, Negasonic Teenage Warhead has been revived in the comics. Her appearance now matches her film counterpart.
  • Ellie can be seen wearing an 'X-Men' uniform similar to the one from X-Men: First Class.
  • In the comics, Negasonic Teenage Warhead is actually a telepath and precognitive mutant. Her abilities were changed for the film due to the fact that the writers thought that by having explosive powers, it would fit more with her name.

Behind the Scenes


External Links