The manga series Fire Force features an extensive cast of characters created by Atsushi Ohkubo. Although native form of Japanese name follows the Eastern name order (family name, given name), the characters names in the series follow the Western name order (given name, family name). For example in , where the given name, , is written before the surname, .
Special Fire Force , also nicknamed , are a firefighting force that was originally formed by members of The Fire Defense Agency, Tokyo Army and The Holy Sol Temple. All eight brigades investigate the Human Combustion Phenomenon and eliminate Infernals whom they administer last rites to.
Special Fire Force Company 8 is a Special Fire Force located in Tokyo, having the fewest resources and members since it was formed in a rush compared to the other Special Fire Force Companies. While having the same task as the other branches, Company 8's has an additional mission in the observation of the other companies in case any of them are hiding vital information from the entire organization for personal reasons. This allowed them to learn of the White Clad's existence and seek to prevent them from realizing their goals.
Shinra is a Second Class Fire Soldier who joined the Special Fire Force Company 8 to save people as a hero while uncovering the cause of fire that destroyed his family twelve years earlier. The ordeal also caused Shinra to be prone to involuntarily grinning when upset, making him appear menacing while learning to control it. As a third generation case of Spontaneous Human Combustion, his Pyrokinesis, nicknamed the , enables him to generate and unleash powerful continuous flame bursts from his feet to propel himself or execute powerful kicks. His powers are further enhanced when the Adolla Burst awakened within him, making him able to move at the speed of light while momentarily dissolving his body, thus being revealed as the Fourth of the Eight Pillars that the Evangelist seeks and making him a fourth generation as well. He later trains himself to use that power and his Adolla Link, gradually learning that he was a product of humanity's subconscious desire to oppose the Evangelist while representing humanity’s rage as the Fourth Pillar. He eventually defeats the Evangelist by developing Soul Resonance to use with the perception-altering powers of Adolla to temporary absorb his family to become Shinrabashoman and reboots the world into one ruled by his creation Shinigami, who created Death the Kid in his image years later.
Battalion Captain of Company 8, he is a role-model firefighter and despite being one of its non-powered members, he is at peak human condition and more than willing to get up close and personal with Infernals while battling them, even physically grappling with them at times despite the high risk to himself. Normally calm and cheerful, he can turn furious in an instant should he encounter someone toying with human life. He is also well aware that "putting to rest" Infernals was just a better alternative for the word "killing", thus he warns the younger members of Company 8 never to display their weapons in public, especially when an Infernal's next of kin is around.
Company 8 Lieutenant and a second generation who manipulates his flames through the use of his firearms. He controls the power, speed, and trajectory of the bullets he fires to the point where he can turn the damage output of a normal bullet into that of a tank shell. An extremely intimidating character, he is stoic, strict, and blunt with his words but does care for his allies as shown with his interactions with Shinra after the latter reveals his younger brother's role within the enemy group and is surprisingly a good cook. During his time in the Tokyo Army, he encountered Maki, whom he would later recruit into Fire Force Company 8 after leaving the military, and witnessed the death of his best friend who had suddenly transformed into an Infernal.
A second generation who was a member of the Tokyo army before joining the Special Fire Force to better help others. Her father is General Danrou Oze of the Tokyo Imperial Armed Forces and her brother Tagaki is a 1st Lieutenant of the Criminal Investigation Division. While an experienced combatant, Maki uses her second generation powers to create living fireballs which also use to power her Iron Owl projectile weapons. Apart from that, she is also able to control flames from a long distance, allowing her to extinguish, absorb, or force away any form of fire. While she has a gentle demeanor, she can snap if someone comments on her being un-feminine due to her muscular physique, and she is inclined to react aggressively.
One of the two surviving nuns of St. Raffles Convent fire, Iris is a follower of the Holy Sol Temple who joined Company 8 as a medic and is one of its non-powered members. She is adamant in her faith and usually gives prayers to dying Infernals as her way of easing their last moments of suffering. She is also trained in basic first aid. Iris is later revealed by Sister Sumire to be the First Pillar's Doppelgänger, resulting in her gradual awakening as the Eighth Pillar who embodies humanity’s despair.
Arthur is an oblivious third generation with delusions of being a knight king, abandoned by his parents who left to travel the world after their small restaurant burned to the ground. Arthur is an exceptionally strong Fire Soldier due to his Ignition Ability to fabricate and control plasma is fueled by his delusions, becoming more powerful the more detached from reality he is. He channels that power through a sword hilt medium he calls Excalibur, allowing him to cut, wield, and manipulate electricity. His name and abilities are inspired by the legendary British ruler King Arthur. Arthur developed a bitter rivalry with Shinra back in their training days that continued after joining the same company and toned down to a more friendly one. During the final battle against the White Clad, his delusions augmented by Adola leaking from the Great Cataclysm, Arthur defeats Dragon in an epic battle that ends with him fatally wounded and drifting out of Earth's orbit while unknowingly infusing life into Excalibur.
Formerly a Fire Soldier and sister of Company 1 until her being an unwitting accessory to Rekka Hoshimiya's crimes got her transferred to Company 8 following her suspension. Tamaki is a third generation whose Ignition Ability, nicknamed "Nekomata" generates pink flames around her in the shape of cat features which she can use for close-range combat or as a signal flare. She has feelings for Shinra after the latter saved her from Rekka. She is cursed to be involved in uncomfortable situations to which she calls "Lucky Lecher Lure Syndrome", which serves as a running gag in the series.
Originally Head of Incendiary Research at Haijima Industries before being assigned a position in Company 8 by a government order. Viktor is a brilliant scientist obsessed with the Adolla Burst, and his quest for scientific truth does not deter him from helping Haijima Industries, his new comrades in Company 8, nor prevent him from associating with Joker.
An engineer famously known as the , his family having a bitter history with Haijima Industries as they developed the Amaterasu reactor and severed ties with the company upon learning its power source. While raised to believe the company stole his family’s Amaterasu plans, Vulcan’s grudge towards Haijima worsened by his grandfather's apprentice Dr. Giovanni working for the company around his grandfather and father mysteriously became Infernals. Vulcan originally wanted nothing to do with the Fire Force and turn down Giovanni's numerous recruitment attempts. It was only after Giovanni stole the Key to Amaterasu which his family guarded for ages that Vulcan breaks his vow and becomes Fire Force Company 8's mechanic to protect his new family and settle things with Giovanni.
Previously an Ashen Flame member under Dr. Giovanni who was code-named , relating to her ability as a Third Generation pyrokinetic to manifest tentacles for various purposes. Traumatized from watching her parents killed by an Infernal, her powers awakened by an Infernal Bug, she created the Lisa Isaribe identity to infiltrate Vulcan's home and find the Key to Amaterasu before exposing herself after her superior decided to get the item personally. Lisa resumed her Ashen Knight duties until Company 8 ventures into the Netherworld, used by Giovanni as a hostage before abandoning her. She joins the Fire Force company 8 soon after, later overcoming her fear of Giovanni to help Vulcan fight him.
Yū is a young boy who works as Vulcan's apprentice in his workshop. When Shinra, Arthur, and Iris try to see Vulcan, they are turned away, but Yū listens to their story and decides to let them in to see Vulcan. Later, Giovanni attacks Yū in order get Vulcan to give him the key to Amaterasu. After the attack, Yū is sent to the hospital to recover and joins Vulcan in Fire Force Company 8 afterwards. During the final battle, Giovanni implanted a parasitic insect into Yū‘s body and takes over after his previous body was destroyed by Vulcan. But Yū is saved by Arthur removing the parasite without any damage on Yū‘s brain.
Special Fire Force Company 1 is an elite group composed mostly of Holy Sol Temple members with jurisdiction in the Shinjuku District, the religious faith later revealed to have connections to the White Clad.
Battalion Commander of Company 1 who saved Shinra when his mother turned into an Infernal and concealed the truth from him, gradually revealing the event was being caused by the Evangelist. He also wears an eyepatch over his right eye as the result of experiencing an Adolla Link when Joker was his ward, destroying his faith in the Holy Sol Temple as attempted to learn more from researching the long forgotten Netherworld. Later crossing paths with Joker, he redirects him to investigate Haijima Industries for clues of the conspiracy within the Tokyo Empire. After being forced by the Holy See and emperor to work with the Knights of the Ashen Flame, Burns arrests Obi with the intent of turning him into an Infernal. But Burns is defeated by Shinra with Joker supporting the latter, leaving him open to be attacked by a doppelgänger Infernal manifesting from his shadow.
A Second Generation whose ability is to convert heat energy into sound energy via a special music instrument which he can then convert into ice which he uses to attack or freeze an opponent. He has an odd speech pattern wherein he uses the same or a similar word as both a verb and a noun in the same sentence (ex. "this trouble is quite troubling"), but is determined and dedicated to the Fire Force's cause.
The main priest of Company 1 who was injured by Arrow in the line of duty. Huo Yan is a Third Generation pyrokinetic which grants him the ability to generate his own flames. Using hand-to-hand combat in conjunction with his Ignition Ability, he is capable of killing Infernal's with ease, using very quick and precise movements. He has shown to be a powerful combatant despite having lost his right arm.
A retired Fire Soldier who resumed his position in Company 1 following Rekka's death and Li's injury. Despite being forced out of retirement, Onyango is perfectly willing to embrace his old role. Even ready to take part in a photo-shoot for the Firefighter’s Calendar. His relationship with Leonard Burns means that Onyango has a great understanding of what drives the enigmatic and stoic captain, while Burns and the other members of Company 1 appear to hold him in a high regard. Onyango alongside Company 1 and Leonard, attended the incident involving Mari Kusakabe's house being on fire.
Special Fire Force Company 2 is composed of militants who answer to the Tokyo Armed Forces.