Benimaru Shinmon possesses fair skin, neck-length wavy black hair partially obscuring his face, and striking heterochromatic eyes: his right eye has a red circular pupil with a black dot, while his left features a red iris with a white X-shaped pupil. He stands 170 cm tall and weighs 62 kg. His standard attire consists of a white t-shirt under a black vest, a grey or dark-blue kimono worn only on his left arm, Special Fire Force trousers tucked into black boots, and occasional fingerless gloves. Off-duty, he wears a black t-shirt under samurai-style hakama with a white waist strap. Personality-wise, Benimaru exhibits a short temper and blunt honesty bordering on rudeness. He prefers operating alone or solely with his brigade, disregarding rules from Tokyo's emperor to focus entirely on protecting Asakusa. Revered there as "Asakusa's King of Destruction" despite property damage during battles, he harbors deep care for the residents, erupting in rage if misinformed about their deaths. He remains typically calm purifying infernals but fights recklessly when angered. He values free will and rejects blind religious faith. Initially hesitant about leadership during Asakusa's crisis, he accepted the role after brigade encouragement. Orphaned early, Benimaru was adopted by Hibachi Shinmon seeking an heir. Hibachi subjected him to ruthless iaido and Iai Shutō training, constantly belittling his failure to master the Sun Wheel technique due to self-doubt. Konro Sagamiya often mediated, conveying Hibachi's underlying intentions. As a child, Benimaru assisted the fire department in subduing infernals. Benimaru wields hybrid pyrokinetic abilities as both a Second and Third Generation user, generating and controlling flames. This rare combination grants devastating power, cementing his reputation as the strongest fire officer. Techniques include using matoi flags for aerial mobility, manipulating external flames over long distances, redirecting bullets, and creating a 4-meter heat-nullifying barrier. Signature moves involve forming flame blades (Iai Hand-Sword: First Form), projecting solar rings (Seventh Form: The Sun), and unleashing the Crimson Moon blast. Intense battles draw Adolla closer to reality via his flames. A master martial artist, Benimaru excels in hand-to-hand combat and iaido, augmenting his physical prowess with flames. He demonstrates immense speed, strength, and durability, outmatching opponents like Shinra Kusakabe's hypersonic Rapid technique and overpowering multiple adversaries simultaneously. He permanently unlocked Hysterical Strength, further enhancing his capabilities, and exhibits poison resistance. Combat achievements include effortlessly defeating a planet-threatening doppelgänger of himself with a single touch. During the Great Cataclysm, he overcame his adoptive father Hibachi's doppelgänger by creating a new technique, Crimson Moon's Sun Wheel, embracing his dual symbolism as ruler of the sun and moon. He later neutralized White-Clad operatives Haumea and Inca by suppressing their flame manipulation within his barrier. Professionally, Benimaru served as Captain of Special Fire Force Company 7 in Asakusa before becoming Supreme Combat Commander with the World Heroes Force. His leadership combines tough discipline with deep brigade loyalty.