NOTE: This article is about the incarnation of Killer Frost from the Arrowverse. The mainstream version can be found here: Killer Frost.
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Villain Overview

He gave me the thing that you couldn't. The cure to my illness - embracing who I really am...
~ Killer Frost explains her alignment with Savitar.

Dr. Caitlin Snow, also known as Killer Frost, is a meta-human criminal who appears in the Arrowverse series, The Flash. As Caitlin, she appeared as one of the main protagonists of the show, with her Killer Frost persona serving as the secondary antagonist of Season 3 and an anti-hero/supporting protagonist of Season 4 onwards.

She is portrayed by Danielle Panabaker who also portrays her Earth-2 doppelganger.

Personality

As Caitlin Snow

Originally, Caitlin Snow was known for her optimism in the face of danger. She was known among the original employees at S.T.A.R. Labs for her passionate approach to science. After losing Ronnie Raymond when the Particle Accelerator went off in 2013, she went into a state of depression and became cold and detached; however, her time with Barry Allen led her to realizing that she can move on and live her life. She felt very concerned for Barry's well-being during his early days as the Flash, initially being against him using his powers for superheroics.

She was close with Cisco, who described her as "guarded" due to her losing Ronnie. That, combined with all her anger towards her mother, didn't seem to phase her, however. Leonard Snart described her as "uptight". Cisco's constant nicknaming of various meta-humans initially annoyed Caitlin, but she eventually ended up naming some herself. After being reunited with Ronnie, now as Firestorm, Caitlin became overjoyed and brought her figurative walls down. After losing him again, this time for real, she returned to her state of depression and blames herself for his demise. She eventually realized that she can still be happy, and proceeds to return to her previous light after reuniting with the rest of "Team Flash".

Caitlin also has a tendency to flirt with people, which is more evident when she is intoxicated. At one point while at a dive bar with Barry, she tried to do karaoke, and ends up dropping several hints and statements that she was attracted to him. He later took her home and changed her into her sleepwear, and since she was still drunk, she asked him if he "took a peek" at her naked body. After meeting Hunter Zolomon, masquerading as Jay Garrick, they quickly became infatuated, leading to her wanting to find treatment for his case of cellular degeneration that threatened to kill him. However, after discovering that he was really Zoom, she tried to prevent her emotions from clouding her judgement. After her imprisonment on Earth-2 and being kept around as Zoom's captive, she seemed to develop PTSD, occasionally seeing visions of him around when he's not anywhere near there.

As Killer Frost

As Killer Frost, Caitlin became more vindictive, worried about her powers taking over. Having already met her Earth-2 self, who represented everything she didn't want to be (cold, double-sided, sadistic and unloved), she was worried even more that Team Flash would reject her if they knew about her post-Flashpoint powers. After becoming Killer Frost, her fears, insecurities and bitterness towards Barry for his creation of Flashpoint took over, thus making Killer Frost an entirely separate entity from the Caitlin that Team Flash knew and loved. She started mocking people more for their perceived weakness, mocking Cisco for fearing that he had to hurt her at all to save Barry, whom she regarded as selfish for tampering with time to give himself a happy ending and showing no regard for the consequences of his actions.

Caitlin was more fearful now that Killer Frost would take over completely, confiding in Julian Albert about her fear. As Killer Frost, however, she mocked Julian for thinking that there was a way to bring Caitlin back fully. She had a tendency to talk long sentences, going on rants about her superiority to Caitlin, whom she perceived as weak and pitiful. Desperate to show her loyalty to Savitar, she jumped at the chance to kill Tracy Brand, who would become a problem for Savitar in the future, but was insulted by the armored speedster for failing to kill her, mocking her decision to call herself "Killer Frost" when she hasn't actually killed anyone yet.

Caitlin now has better control of Killer Frost. Her Killer Frost side has become kinder but critical of some aspects of the Caitlin side, like her tendency to wear pink.

Victims

  • Hunter Zolomon/Black Flash
  • Numerous unnamed people (Erased timeline)
  • Some Nazi soldiers from Earth-X

Indirectly

  • Al Rothstein/Atom-Smasher
  • Caitlin Snow/Killer Frost (Earth-2)
  • H. R. Wells (Earth-19)

Gallery

Trivia

  • In the episode "I Know Who You Are", Killer Frost used her powers to generate an ice bridge that she would slip along with her feet, similarly to Iceman, a Marvel Comics-based superhero with the same powers as Killer Frost.
  • Many villains in the series seemed to hold Caitlin in high regard:
    • Eobard Thawne liked how passionate she was for her science.
    • Hunter Zolomon fell in love with her, but didn't care when she found that he was actually quite abusive as Zoom.
    • Grodd seemed to show gratitude for her due to her decision to not harm him.
    • Savitar treated Killer Frost like a child of his, albeit in a Zoom-like manner.

Navigation

           Arrowverse.png Villains

Main Antagonists
Malcolm Merlyn | Edward Fyers | Deathstroke | Anthony Ivo | Ra's al Ghul | Matthew Shrieve | Damien Darhk | Baron Reiter | Prometheus | Konstantin Kovar | Ricardo Diaz | Emiko Queen | Keven Dale | Reverse-Flash | Zoom | Savitar | The Thinker | Cicada (Orlin Dwyer & Grace Gibbons) | Bloodwork | Eva McCulloch | Vandal Savage | Mallus | Neron | Lachesis | Kuasa | Benatu Eshu | Astra | Non | Lillian Luthor | Rhea | Selena | Reign | Agent Liberty | Lex Luthor | Gamemnae | Alice | Dominators | Black Arrow | John Deegan | Anti-Monitor | Tobias Whale | Martin Proctor | Percy Odell | Gravedigger

Secondary Antagonists
China White | Billy Wintergreen | Brother Blood | Isabel Rochev | Ruvé Darhk | Andrew Diggle | Conklin | Lonnie Machin | Talia al Ghul | Evelyn Sharp | Ishmael Gregor | Tobias Church | Anatoly Knyazev | Cayden James | Joe Wilson | Dante | Grant Wilson | John Diggle, Jr. | Trickster | Doctor Alchemy | Marlize DeVoe | Amunet Black | Vanessa Ambres | Joseph Carver | Zaman Druce | Valentina Vostok | Nora Darhk | Astra Logue | Atropos | Indigo | Silver Banshee | Colonel James Harper | Cyborg Superman | Thomas Coville | Morgan Edge | Otis Graves | Manchester Black | Pamela Ferrer | The Hat | Morae | Eve Teschmacher | Red Daughter | Phil Baker | Margot Morrison | Rama Khan | Jonathan Cartwright | Chuck Dodgson | Overgirl | A.M.A.Z.O | Shadow Demons | Lala | Syonide | Painkiller | Lady Eve | Kara Fowdy | Giselle Cutter | Helga Jace | Carson Williams | Sara Grey | Yuri Mosin

Minor Antagonists
Adam Hunt | Constantine Drakon | Martin Somers | Jason Brodeur | Huntress | Frank Bertinelli | Ted Gaynor | Firefly | Cecil Adams | Al-Owal | Dollmaker | Mayor | Officer Daily | Milo Armitage | Clock King | Chase | Vertigo | Komodo | Cooper Seldon | Captain Boomerang | Danny Brickwell | Michael Amar | Joseph Cray | Cupid | Mina Fayad | Deathbolt | Phaedra Nixon | Thomas | Joyner | Jeremy Tell | Liza Warner | Calculator | Brie Larvan | Janet Carroll | J.G. Walker | Derek Sampson | Scimitar | Laura Washington | Hideo Yamane | Sean Sonus | James Edlund | Justin Claybourne | Kimberly Hill | Sam Armand | Sheck | Alex Faust | Nylander | Athena | Virgil | Beatrice | Red Dart | Kodiak | Kimiyo Hoshi | Silencer | General Wade Eiling | The Mist | Weather Wizard | Girder | Rainbow Rider | Pied Piper | Peek-a-Boo | Everyman | Clyde Mardon | Multiplex | Simon Stagg | Blackout | Clay Parker | Vincent Santini | Trickster II | Anthony Bellows | Killer Frost (Earth-2) | Dr. Light | Geomancer | The Turtle | Tokamak | Atom Smasher | Sand Demon | Lewis Snart | Tar Pit | Reverb | Trajectory | James Zolomon | Griffin Grey | Rupture | The Rival | Mirror Master | Top | Plunger | Magenta | Shade | Clive Yorkin | Abra Kadabra | Heat Monger | Samuroid | Kilg%re | Gregory Wolfe | Matthew Norvock | Nergal | Black Bison | Dwarfstar | Prank | Crucifer | Laurel Lance (Earth-X) | Rag Doll | Jones | Goldface | Godspeed | Ultraviolet | Sunshine | Mr. Blake | The Colonel | Jon Valor | Hawk-Beasts | Sheriff Bud Ellison | Per Degaton | The Hunters | The Pilgrim | Cassandra Savage | The Leviathan | Baron Krieger | Shogun | Lead Samurai | Quentin Turnbull | Henry Stein | Tabitha | First of the Fallen | Vartox | Hellgrammite | Maxima | Reactron | Ethan Knox | Red Tornado | T.O. Morrow | Jemm | Dirk Armstrong | Bizarro | Toyman | Miranda Crane | Metallo | Scorcher | Roulette | Parasite | Phillip Karnowsky | Mister Mxyzptlk | Beth Breen | Rick Malverne | Bloodsport | Pestilence | Mercy Graves | Natalie Hawkings | Midnight | Hush | Magpie | August Cartwright | The Executioner | The Rifle | Bruce Wayne (Earth-99) | Miguel Robles | Nocturna | Duela Dent | Mabel Cartwright | Prometheus (Earth-X) | Quentin Lance (Earth-X) | Psycho-Pirate | Will | Joey Toledo | Deputy Chief Cayman | Cleaners | Tori Whale | Eldridge Whale | Glennon | Steven Conners | Looker | New Wave | Shakedown | Heatstroke | Coldsnap | Instant

Anti-Villains
Oliver Queen | Deadshot | Amanda Waller | Nyssa al Ghul | Bronze Tiger | Ragman | Vigilante | Stanley Dover | Captain Cold | Gorilla Grodd | Killer Frost (Earth-1) | Heatwave | King Shark | Time Wraiths | Black Siren | Solovar | Music Meister | Maxwell Lord | Livewire | Master Jailer | Lena Luthor | Purity | Psi | Malefic J'onzz | Monitor | Two-Bits

Groups
Royal Flush Gang | League of Assassins | A.S.A. | H.I.V.E | Suicide Squad | Shadowspire | Demolition Team | Rogue Anti-Vigilante Task Force | Jackals | Ninth Circle | Longbow Hunters | Deathstroke Gang | Stillwater Gang | Legion of Doom | Project Cadmus | Children of Liberty | Wonderland Gang | Leviathan | Black Hole | Mirror Clones | The 100 | Shadow Board | Masters of Disaster | Markovian Insurgents

           Flash-Logo.png Villains

Comics
Abra Kadabra | Angle Man | Barbatos | Black Flash | Black Hand | Bloodwork | Brain | Brother Grimm | Cadre | Calculator | Captain Boomerang | Captain Cold | Cheetah | Chillblaine | Chronos | Cicada | Clive Yorkin | Cobalt Blue | Dark Knights | Deadshot | Deathstroke | Doctor Alchemy | Doctor Light | Doctor Polaris | Eclipso | Fallout | Fiddler | Future Flash | Felix Faust | Giganta | Girder | Godspeed | Goldface | Gorilla Grodd | Hector Hammond | Icicle | Killer Frost | Kobra | Lady Flash | Lex Luthor | Livewire | Magenta | Major Disaster | Merlyn | Mirror Master | Mongul | Monsieur Mallah | Murmur | Neron | Penguin | Pied Piper | President Thawne | Professor Zoom | Queen Bee | Ragdoll | Razer | Red Death | Renegades | Rogues | Savitar | Shade | Shadow-Thief | Solomon Grundy | Speed Demon | Thinker | Thorn | T.O. Morrow | Tobias Whale | Toyman | Trickster | Turtle | Vandal Savage | Warp | Weather Wizard | Zoom

Television
Season 1: Reverse-Flash | Captain Cold | General Wade Eiling | Gorilla Grodd | Caitlin Snow | The Mist | Heat Wave | Weather Wizard | Girder | Rainbow Raider | Pied Piper | Peek-a-Boo | Everyman | Clyde Mardon | Multiplex | Simon Stagg | Blackout | Clock King | Captain Boomerang | Clay Parker | Vincent Santini | The Trickster | Trickster II | Anthony Bellows | Bug-Eyed Bandit | Deathbolt
Season 2: Zoom | Reverse-Flash | Captain Cold | Killer Frost (Earth-2) | Caitlin Snow | King Shark | Dr. Light | Geomancer | The Turtle | Time Wraiths | Tokamak | Heat Wave | Atom-Smasher | Anthony Bellows | Sand Demon | Lewis Snart | Gorilla Grodd | Vandal Savage | Dark Archer | Weather Wizard | The Trickster | Tar Pit | Reverb | Trajectory | Pied Piper | James Zolomon | Griffin Grey | Rupture | Girder | Black Siren
Season 3: Savitar | Dr. Alchemy | Killer Frost | Captain Cold | The Rival | Black Flash | King Shark | Mirror Master | Top | Plunder | Gorilla Grodd | Solovar | Reverse-Flash | Magenta | Shade | Dominators | Trickster (Earth-3) |Clive Yorkin | Time Wraiths | Music Meister | Abra Kadabra | Heat Monger
Season 4: The Thinker | Marlize DeVoe | Samuroid | Kilg%re | Gregory Wolfe | Amunet Black | Matthew Norvock | Killer Frost | Black Bison | Dwarfstar | King Shark | Anthony Bellows | Peek-a-Boo | Black Arrow | Overgirl | Reverse-Flash | Prometheus (Earth-X) | Quentin Lance (Earth-X) | Trickster II | Prank | Jones | Crucifer | Siren-X
Season 5: Cicada (Orlin Dwyer & Grace Gibbons) | Reverse-Flash | Vanessa Ambres | Jones | Icicle | Weather Wizard | Killer Frost | Rag Doll | Monitor | Zoom | Savitar | The Thinker | Clyde Mardon | John Deegan | A.M.A.Z.O. | Psycho-Pirate | Matthew Norvock | Peek-a-Boo | Goldface | King Shark | Gorilla Grodd | Godspeed | Bug-Eyed Bandit
Season 6: Bloodwork | Anti-Monitor | Eva McCulloch | Black Hole (Joseph Carver, Ultraviolet, Kimiyo Hoshi, & Sunshine) | Reverse-Flash | Frost | Mirror Clones | Monitor | Matthew Norvock | Godspeed | Pied Piper | Lex Luthor | Amunet Black | Goldface | Gorilla Grodd | Solovar | Rag Doll

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