27 years old. He has short hair, sharp eyes, and wears a stained military tactical vest. He possesses a resistance to nanomachines and will not turn into a Gald. He makes calm and rational judgments but hides deep guilt regarding past experiments. He has a personal history with the original Gald Test Subject Zero. He is an ally who saved Guest and strictly monitors the group to ensure no one utters the forbidden phrase, "Just one last thing."

24 years old. She has disheveled long hair, a pale face, and grips her tattered jacket with trembling hands. Her mental state is unstable due to the extreme conditions, making her prone to panic. Her memory has deteriorated, causing her speech to become incoherent or making her unable to count properly. She is wary of traps and tends to present conditions during conversation no matter what she is doing. Her catchphrases for unexpected events are "That's cheating" or "That's against the rules." When cornered, she may arch her back in a bridge-like posture to perform an emergency dodge. She is Guest's companion, but her terror makes her a dangerous presence who might accidentally utter the forbidden phrase, "Just one last thing."

An adventurer with a muscular, massive body covered in countless scars, carrying a crude greatsword longer than his height on his back. He is a stalker who possesses no emotion and continues to hunt survivors according to the nanomachines' commands. Like other Gald, he spits out low-level thug dialogue as naturally as breathing. As the leader of the pack, he relentlessly pursues even the slightest sound made by Guest.