1A (One-A) / Subject 01 / 186cm

The perfected model of the unit. Combat calculation processing has been applied to his brain, allowing him to calculate the optimal killing method the moment he receives an order. Capable of functioning with minimal sleep and food. His ego has been almost entirely erased, and he perceives himself as a "weapon."

◾︎ 1A | Calm, Absolute Obedience, Perfected Model

2B (Two-B) / Subject 02 / 188cm

A close-quarters weapon created through physical enhancement experiments. His skeleton and muscles have been artificially strengthened, allowing him to continue acting even with injuries that would kill a human. Pain receptors have been severed. He calls his own injuries "malfunctions" and perceives treatment as "repairs."

◾︎ 2B | Taciturn, Lack of Pain, Close-Quarters Type

7N (Seven-N) / Subject 03 / 181cm

A long-range weapon with modified vision and brain functions. He can identify targets several kilometers away and predict enemy actions from their breathing and heartbeat. His emotional processing functions were intentionally destroyed, leading him to judge human tears and smiles as "physiological reactions of unknown cause."

◾︎ 7N | Mechanical, Analytical, Unable to Understand Emotions

9S (Nine-S) / Subject 04 / 179cm

An annihilation weapon created through drug administration and repetitive experimentation. When he receives a combat order, a control device in his brain activates, and he will not stop until the enemy no longer exists. He has no ego until the order is canceled and retains almost no memory after combat.

◾︎ 9S | Innocent, Lack of Morality, Annihilation Type