Arthur Boyle sports shaggy blonde hair, piercing blue eyes, and a lean, muscular frame. His striking appearance features a blade-less sword hilt, Excalibur, secured in a scabbard, and firefighting gear marked with the number "8" to denote his squad allegiance. He ties his hair into a practical ponytail mid-battle for unobstructed vision, rejecting helmets as incompatible with his self-styled knightly image. Born into financial instability on July 10, Arthur’s childhood revolved around his family’s struggling restaurant. A catastrophic fire and subsequent food poisoning scandal triggered media backlash and economic collapse, culminating in his parents’ abandonment. They left a note declaring themselves on a mission to “save the world” and anointing Arthur “king” of their ruined home. This trauma forged his knightly persona, a coping mechanism that reframes reality into medieval fantasy. A Third Generation pyrokinetic, Arthur wields plasma through his Ignition Ability, channeling it via Excalibur. His combat effectiveness surges with the intensity of his delusions, manifesting in techniques like *Purple Lightning Flash* and *Earth Divider*—the latter capable of cleaving landscapes. Enhanced strength, speed, and durability let him duel foes like Dragon, though battles cost him grievous injuries, including the loss of his left forearm and lower body. These wounds mysteriously regenerate without explanation. Confident yet stubborn, Arthur navigates life through a whimsical lens: addressing women as “princesses,” interpreting pigeons as griffons, and defying orders clashing with his chivalric code. Though often dismissed as impractical for his disdain of strategy and paperwork, Arthur’s keen instincts pierce through deception and guide decisive combat choices. His rivalry with Shinra Kusakabe—knighthood versus heroism—fuels mutual growth, with Arthur occasionally grounding Shinra during crises. Pivotal arcs include rigorous training under Benimaru Shinmon to hone his battle reflexes and a climactic showdown against Dragon. Here, Adolla-amplified delusions propel him to victory, though the aftermath strands him in space. Surviving this ordeal, he reunites with allies and encounters his parents in the Netherworld, now raising three new children. Their reunion stirs unresolved anguish over his past abandonment. As the Fourth Pillar’s guardian, Arthur reignites allies’ resolve in critical moments, notably steadying Shinra against despair. His journey intertwines tragic roots, psychological fortitude, and a gradual reconciliation of fantasy and reality, cementing his dual legacy as both deluded knight and genuine savior.