Arrow holds the position of Primary Vice-Commander within the Knights of the Ashen Flame, the knightly subsidiary of the White-Clad cult, and serves as the personal bodyguard for Shō Kusakabe, the Third Pillar. She possesses long dark-blue hair, typically secured in a small bun, with light-colored clips framing her bangs. Her dark blue eyes feature distinctive arrow-shaped irises. Arrow dons the standard White-Clad uniform: a white burqa-like mask, a cape with shoulder guards, a jumper bearing a red cross insignia, gloves, and trousers. Following a confrontation with Takehisa Hinawa, she bears a prominent horizontal scar across her face above the bridge of her nose.
Initially presenting a calm and serious demeanor, Arrow displays unwavering dedication to the White-Clad's objectives and the Evangelist's cause, viewing human emotions as worthless against the coming global transformation. She frequently expresses frustration with Haumea's unpredictable and childish conduct, often receiving verbal abuse in return. Her loyalty gradually shifts exclusively toward Shō; she declares she would follow him anywhere regardless of his actions, existing solely to serve as his shield. This profound devotion leads her to question the organization's motives and ultimately defect from the White-Clad alongside Shō. Her defection reveals a more expressive, hopeful, and cooperative side as she collaborates with former adversaries, including Special Fire Force Company 8, during the cataclysm.
A Third Generation pyrokinetic, Arrow generates a bow and arrows from flames ignited on her left arm, specializing in long-distance combat. Her exceptional eyesight grants her extreme precision and enables stealth-based ambushes. Her flame arrows possess high velocity and destructive force, capable of severing limbs, penetrating torsos, and burning through fire-resistant materials instantly. She can manipulate their trajectory mid-flight and create explosive variants if they are deflected. This potent ranged combat capability earns her comparisons to an artillery unit within her organization.
Her involvement spans key conflicts: She assassinates Rekka Hoshimiya during the VS. Company 1 arc to prevent information leaks. In Asakusa, she engages Shinra Kusakabe and Arthur Boyle alongside Haran, retreating after Haran transforms into a Demon Flame Human and is defeated. The Netherworld arc features a prolonged sniper duel with Takehisa Hinawa; though initially holding the advantage, Hinawa redirects her flames to overpower her, leaving her severely injured and scarred. During the Haijima Industries incident, she confronts Maki Oze and Vulcan Joseph but is electrocuted by Haumea for perceived failures.
A pivotal moment occurs when Shō questions her motives during the Stone Pillars arc; she reaffirms her fervent commitment to him personally, stating her life's purpose is bound to him "like an arrow." This culminates in her defection. She later aids Company 8 by explaining the cataclysm's mechanics and the Pillars' whereabouts, urging cooperation to stop Amaterasu despite their past conflict. Following the second Great Cataclysm, Arrow is revived after Shinra Kusakabe manipulates time to reset reality.