Gustav Honda commands the 2nd Special Fire Brigade as Battalion Commander. A Third Generation pyrokinetic, he generates intense flames directly from his scalp. He utilizes this power to unleash fiery headbutts capable of repelling objects and shattering debris. His notable physicality—strength, speed, and durability—enables him to ram and defeat giant infernals or launch himself as a projectile from specialized cannons.
Standing 165 cm tall and weighing 110 kg, his appearance features a bald scalp with shaved sides, a prominent jawline, distinct black rings encircling his eyes, and a bushy black mustache. He wears standard-issue bunker gear marked with the number "2," signifying his brigade, which includes shoulder pads, a high collar, and cross-shaped insignias.
Personally, Gustav presents as a serious military figure, demonstrating unwavering loyalty to Raffles III and the Theocratic Tokyo Empire. This loyalty sometimes causes friction with captains employing unconventional methods. Despite his stern demeanor, he shows genuine care for subordinates, evidenced by rescuing Takeru Noto from falling debris and offering encouragement during training. He exhibits competitiveness, especially in ensuring his brigade's recruits match others. Subordinates occasionally speculate humorously about whether his baldness preceded or resulted from his pyrokinetic abilities, gossip he remains unaware of. Off-duty, he prioritizes his wife and daughter, expressing apprehension about his wife's disapproval and striving daily for their happiness. He enjoys hotpot and milk tea but dislikes poorly prepared hotpot meals.
His involvement spans significant events: he first appears supervising Takeru Noto during the Rookie Fire Soldier Games and later saves him from a collapsing building. He dispatches Takeru to train with Companies 1, 5, and 8 to enhance his skills. During a giant infernal attack on Tokyo, he confronts and defeats the threat using his ignition ability. As the Evangelist's activities escalate, he attends high-level meetings with other battalion commanders addressing the Adora Burst and White-Clad incursions. He plays a key role during the Stone Pillars arc, leading Company 2's response to the first pillar's emergence and ordering targeted strikes against it. Following the second Great Cataclysm, his existence is restored after Shinra Kusakabe manipulates time to reset reality.
Due to Company 2's direct military oversight, he and his brigade are often excluded from major White-Clad investigations. However, he later collaborates with Company 8 on critical missions, including an underground operation to thwart the Evangelist's plans against the city. After this mission, he becomes a consistent ally to Company 8.
His name potentially derives from Old Norse elements meaning "staff of the gods," the Schwerer Gustav artillery piece, or the Japanese corporation Honda. Additional details note his birthdate as November 3, blood type O, and self-described identity as a hard-working captain. He feels an affinity for bovines and maintains respect for General Oze.