ST AR-15 from Girls' Frontline is depicted as a poised, gun-tuned operator figure in 1/7 scale. The sculpt emphasizes a sleek, armor-clad silhouette with a high-collar bodysuit and tactical gear that echoes the aesthetic of her in-game counterpart. Her hair is styled into a practical, short cut, with a restrained color scheme of gunmetal, charcoal, and muted military tones. The figure features a long, rifle-inspired design element integrated into the outfit: a segmented torso piece imitating armor plates, a belt with accessory pouches, knee-high boots, and a stylized rifle stock motif forming part of her stance. The paintwork shows fine weathering, metallic accents, and clear, expressive eyes beneath a sculpted visor-like headgear. The base is a neutral display stand that accentuates the figure without overpowering it.

In Girls' Frontline, ST AR-15 is one of the Tactical Dolls designed to simulate the reliability and precision of the real-world AR-15 platform. She embodies cool-headed pragmatism, a calm presence under fire, and a fierce loyalty to her squad. Her backstory centers on adapting military hardware into a sentient operative who can maneuver through dangerous urban environments, balancing firepower with fieldcraft. As a member of a trusted team, she spends routines testing new gear, optimizing ammunition, and rescuing comrades from peril. Her character arc often highlights resilience, strategic thinking, and a quiet willingness to shoulder risk for the group’s safety, making her both dependable and aspirational for recruits.