Arthur Boyle

Arthur Boyle operates under the sincere belief that he is a knight of legend, and his combat performance improves measurably the more completely he commits to that delusion.

Background

Arthur and Shinra trained together as children and share a competitive friendship built around mutual ambition to become heroes. Assigned to Special Fire Force Company 8, Arthur's plasma-based Fourth Generation ability quickly established him as one of the unit's most effective combatants — a status he maintains primarily by refusing to question the internal mythology that powers his fighting style.

Powers & Abilities

Ability	What it does
Plasma Sword "Excalibur"	Generates a blade of superheated plasma from his hand; its length, heat, and stability increase proportionally to how deeply he believes in his own knight persona at that moment
Fourth Generation Pyrokinesis	Produces and directly manipulates plasma rather than conventional ignition flame, giving his attacks a different quality to Third Generation abilities
Knight's Focus	His combat output is empirically linked to the completeness of his self-belief; external reality that contradicts the knight persona measurably weakens him

Personality

Earnest to a fault and operating on a personal chivalric code that is entirely self-created and occasionally baffling to everyone around him. Arthur is not particularly intelligent in conventional terms, but his sincerity is total, and the series treats that as a literal mechanistic advantage rather than a personality quirk.

Relationships

• Shinra Kusakabe — his oldest rival and closest teammate; they push each other competitively without it ever becoming genuinely hostile, and the dynamic is the most consistent relationship in the series
• Iris — his Company 8 companion whose steady presence grounds him when his knight persona runs directly into physical reality

Role in the Story

Arthur is Fire Force's argument that belief has tangible force — not as metaphor but as a literal mechanistic principle embedded in how his ability functions. He is also the series' most reliable source of comedy, which the story deploys as counterweight against its darker threads on trauma and identity.