The user can generate and manipulate fire within them in a way that allows them to shape the exhaling of the effect. These shapes can include bursts, blasts, streams, beams, spits, spheres, lasers, and even a mist of it from the mouth.
Kyōko Kirisaki (Black Cat) using her Heat to produce a fireball.
Cerberus/Kero (Cardcaptor Sakura)
Chang Changku/Cyborg 006 (Cyborg 009)
Greymon (Digimon) using his Nova Blast Attack.
Tyrannomon (Digimon) using his Fire Breath.
A Saiyan Great Ape (Dragon Ball Z)
Dabura (Dragon Ball Z)
Princess Snake (Dragon Ball Z)
Chief Moginaian (Dragon Ball Super) breathing fire at Beerus.
Hirudegarn (Dragon Ball Z: Wrath of the Dragon) using his Gigantic Flame.
Carcharodontosaurus (Dinosaur King)
Natsu Dragneel (Fairy Tail) using Fire Dragon's Roar.
After taking a deep breath, Gabimaru (Hell’s Paradise: Jigokuraku) can...
...expel a large torrent of fire with his Ninpō: Fire Bridge.
Kyōko Kirisaki (To Love-Ru) breathing a stream of fire.
Muhammed Avdol's Stand, Magician's Red (JoJo's Bizarre Adventure Part III: Stardust Crusaders)
Tohru (Miss Kobayashi's Dragon Maid) using her fire breath to cook.
Hiruzen Sarutobi/Third Hokage (Naruto)
Sasuke and Itachi Uchiha (Naruto) using their clan's signature Fire Style: Fireball Jutsu/Grand Fireball Technique/Blaze of Glory.
Obito Uchiha's (Naruto) Fire Style: Fireball Jutsu/Grand Fireball Technique/Blaze of Glory.
Madara Uchiha's (Naruto) Fire Style: Majestic Destroyer Flame.
As a being born from fire, the Guardian ÄRM, Phoenix (Marchen Awakens Romance) can shoot flames from its mouth.
Franky (One Piece) using his Fresh Fire technique.
Largo (One Piece) breathing out a Very Fire Net.
Kaido (One Piece) using Boro Breath in his dragon form.
Reshiram (Pokémon) using its signature move Blue Flare to breathe extremely hot blue flames.
Ninetails (Pokémon) using Flamethrower.
Houndoom (Pokémon) using a toxin-fueled Flamethrower.
Flareon (Pokémon) using Fire Spin.
Mega Charizard X (Pokémon Origins) using Fire Blast.
Hyottoko (Rurouni Kenshin) placed a 9 liter oil bag in his gut, and can breath fire with a deep exhale and his flint teeth.
Red-Eyes Black Dragon (Yu-Gi-Oh!) using Black Fire Bullet.
Yamata Dragon (Yu-Gi-Oh!) using Heaps of Bodies and Streams of Blood to release powerful streams of flames.
Azula (Avatar: The Last Airbender)
Jafar (Aladdin) breathing fire.
Jake Long (American Dragon: Jake Long)
Haley Long (American Dragon Jake Long)
Luong Lao Shi (American Dragon: Jake Long)
Princess Dorathea (Danny Phantom)
Heatblast (Ben 10)
Pallorfang (Ben 10: Ultimate Alien)
Ultimate Kevin (Ben 10: Ultimate Alien) possesses Alan Albright and Heatblast' fire breath.
Monster Kevin (Ben 10 Reboot) possesses Hot Shot's fire breath.
Hot Shot (Ben 10 Reboot)
Boboiboy Blaze (Boboiboy the Movie)
Bizarro's Fire Breath (DC Comics)
Bizarro (DC Comics: New 52)
Hot Spot (DC Comics)
Spitfire (Extinctioners) is a komodo dragon with the ability to emit flame from his mouth.
Duncan (Firebreather) being a half human and half Kaiju has the power to breathe fire.
Spawn's (Image Comics) fire breath
Dragon Talisman (Jackie Chan Adventures)
Jade Chan as the Amazing T-Girl (Jackie Chan Adventures)
Jack Starsmore (Marvel Comics)
Madame Drache (Marvel Comics)
After being experimented by Weapon X, Sauron (Marvel Comics) could breath fire.
Lockheed (Marvel Comics)
Fin Fang FOOM!!!! (Marvel Comics)
Jim Hammond/Human Torch (Marvel Comics)
Johnny Storm/Human Torch (Marvel Comics)
Sunfire (Marvel Comics)
Ghost Rider (Marvel Comics)
Dragon Man (Marvel Comics)
Dante Pertuz/Inferno (Marvel Comics)
Daybreaker (My Little Pony: Friendship is Magic) can breathe fire from her mouth to incinerate her enemies.
Cosma (OK K.O.! Let's Be Heroes)
Boxman Jr. (OK K.O.! Let's Be Heroes)
Aku's Fire Breath (Samurai Jack)
Demon KISS (Scooby-Doo! and Kiss: Rock and Roll Mystery)
Maleficent (Sleeping Beauty) breathing powerful green flames.
Alexandrite (Steven Universe)
Fire Salt (Steven Universe) is a Gem dust that, should a human ingest it, causes them to spit fire uncontrollably.
Kavaxas (Teenage Mutant Ninja Turtles) breathing green fire.
Taranee Cook (W.I.T.C.H)
Archimedes (Archie's Sonic the Hedgehog)
A dragon breathing fire.
Smaug the Golden (The Hobbit)
Many species of dragon (The Last Dragon) can breathe fire by releasing gases after consuming metals, such as platinum, to ignite them; this ability is used by Prehistoric Dragons as a defense against predators or rivals…
…Forest Dragons to cook their kills to make them easy to digest…
…and Mountain Dragons to incubate their developing eggs.
Patrick Donovan (The Young Guardians book series) once accidentally melted a mirror with his fiery breath.
Lavagirl (Adventures of Sharkboy and Lavagirl) sneezes fire.
The Dragon Warlock (Charmed)
Godzilla (Godzilla) using his powerful and iconic special attack,Atomic Flame.
After Henry Hart/Kid Danger (Henry Danger) went through the Dentitizer he was temporarily indestructible with the side effect of breathing fire when he laughs.
Aldrich Killian (Iron Man 3) breathing fire.
As a "reverse" Kryptonian, Bizarro Supergirl (Supergirl 2016 TV series) has the ability to breathe fire as opposed to freezing breath.
When either of the Thunder Twins (The Thundermans) eat spices or peppers it makes them breathe fireworks effects or turns it into actual uncontrollable fire. This also makes them unable to use their regular Heat Breath and also cancels out their Freeze Breath for a while.
Ornn, the Fire Below the Mountain (League of Legends)
Laviente (Monster Hunter series) breathing a fire mist at a hunter.
Rathalos (Monster Hunter series) shoots a fireball.
Hanzo Hasashi/Scorpion's (Mortal Kombat) famous and classic Toasty! fatality.
True to their physiology, the three Dragonmen (Serious Sam) have the ability to breathe fire in two ways, such as emitting it as flame balls, and/or streams of fire which the sergeant and giant variants are only capable of doing.
Tricky (Star Fox Adventures)
Bowser (Super Mario)
Bowser (Super Smash Bros. Brawl) breathing fire.
Superspicy Curry (Super Smash Bros. series) a dish so spicy that it causes anyone who ingests it to spit fire uncontrollably.
Gasbags (Unreal Series) are well known for breathing fire from within their lungs.
One of Lilith's (Vanguard Princess) Special Attacks is a small burst of fire from her mouth.