Arthur Boyle, a Third Generation pyrokinetic and Fire Soldier in Special Fire Force Company 8, possesses a lean muscular frame, shaggy blonde hair tied into a combat ponytail, and piercing blue eyes. His uniform features protective gear branded with "8," a scabbard for his blade-less sword Excalibur, and a steadfast refusal to wear helmets, which he deems unworthy of his self-fashioned knightly identity. Born to owners of a failing restaurant, Arthur’s life fractured when a fire ravaged their business, prompting his parents to abandon him with a letter declaring a global quest and naming him acting king. This abandonment ignited a chivalric delusion, recasting pigeons as griffons and firefighting equipment as medieval armaments. He later joined the Fire Force Training Academy alongside Shinra Kusakabe and Ogun Montgomery, sparking a rivalry with Shinra over conflicting ideals of knighthood versus heroism. Arthur’s combat mastery derives from his Ignition Ability to channel flames through Excalibur, generating plasma that slices metal, deflects projectiles, and conjures electricity. His power intensifies when fully immersed in his knightly delusions. Enhanced physical traits—superhuman strength, speed, and durability—enable him to repel Infernals, evade light-speed assaults, and endure catastrophic injuries. Training under Benimaru Shinmon sharpened his instincts, nullified susceptibility to illusions, and honed kinetic vision to track rapid movements. During the apocalyptic clash with the White Clad, Arthur’s delusions fuse with Adolla’s reality-warping energies. Wielding the Star Ring, he taps humanity’s collective consciousness to amplify his abilities, surviving in space to confront Dragon, architect of the Great Cataclysm. Their duel severs Dragon from the planet, costing Arthur his lower torso and left forearm—later regenerated. As guardian of the Fourth Pillar, he reignites Shinra’s hope against despair, anchoring his role as a beacon of defiance. Arthur blends brash confidence with naïve simplicity, often dismissing others with a trademark "Hmph." Though perceived as dim-witted—struggling with bureaucracy and tactics—his blunt perspective unveils hidden truths, like exposing impostors. His unyielding knightly code fuels a reckless yet noble pursuit of justice, clashing with strategic planning but fostering unexpected teamwork, particularly with rival Shinra. Evolving from a comedic eccentric to a linchpin against annihilation, Arthur embodies imagination’s triumph over despair. His ultimate sacrifice to halt Dragon and rekindle global hope cements his legacy as the self-crowned "Knight King," a testament to delusion’s power to reshape reality.