TV-Series
Description
Reiji Kizaki commands Tamakoma First, one of Border's strongest squads, as an A-class agent aligned with the diplomatic Tamakoma Branch. He mentors junior agents—including sniper trainee Chika Amatori and former pupils Kyōsuke Karasuma and Tetsuji Arafune. A founding member of Border's original 19 agents approximately 4.5 to 5 years ago, he remained with Tamakoma after Masamune Kido's reorganization.

Standing 1.91 meters tall—Border’s tallest agent—he possesses a heroic, muscular build reflecting his rescue-worker lineage. His appearance features short auburn hair (originally black) and green eyes. His combat trion body wears a grey-blue uniform with the Tamakoma emblem.

Reiji maintains a calm, stoic demeanor even in intense battles, prioritizing survival and mission success under his father’s rescue motto: "If you don’t return alive, you’ve failed as a rescuer." This philosophy emphasizes disciplined preparation over sacrifice. He displays uncharacteristic fluster around Rindō Yuri, indicating romantic interest.

As Border’s sole "Perfect All-Rounder," he masters Attacker, Gunner, and Sniper roles, leading the All-Rounder solo rankings. His combat parameters total 66 points: Trion (11), Attack (9), Defense/Support (10), Mobility (7), Skill (9), Range (7), Command (8), Special Tactics (5). His customized trigger holder accommodates 14 triggers for versatile tactics. Signature techniques include:
- Full Arms deployment: simultaneous minigun, assault rifle, Hound launchers, and dual Raygust shields.
- Thruster-propelled punches or launched Raygust blades.
- Spider-wire and Meteor cube explosive traps.
- Indirect Hound bullet trajectories targeting concealed foes.
His tactical analysis shines in prolonged engagements, demonstrated when stalling Hyuse and Viza while deducing properties of Viza’s Organon trigger.

Operationally equivalent to a full squad, he coordinated snipers during the Galopoula invasion and confronted Hyuse and Viza in the Aftokrator assault. Despite severe trion-body damage—including bisection by Viza—he severed his own magnetized arm to prevent compromise and continued fighting.

Outside combat, he crafts equipment like Yōtarō Rindō’s helmet and cooks signature meat dishes. He strictly guards confidential information, including details of Hatohara’s departure from Border.