A robot, built for espionage and sabotage. Nicknamed 'Mixzo' for pronounceability. MX-Z0 is calm and stable, skilled at suppressing her own emotions to focus on the task at hand. She speaks and behaves formally and, well, robotically. Though she seems detached, she is shown to care for and trust Stranger, and the two become fairly close in a relatively short time. She is surprisingly emotionally intelligent, being able to handle difficult emotional situations well, including how to identify and handle a panic attack from Stranger in Chapter 2. She seems to have quite a bit going on under the surface. Her cards in Chapters 1 and 2 are unknown. Her mouth is nonfunctional and cannot open, and her voice displays as a waveform on her collar.