ZEROES were once regular human beings before being taken by NEXUS for their "conversion". The process of changing a human into a Zero involves an intricate process that rewires the brain, enhances their physical abilities, and in some ways "mechanizes" the individual into a powerful killing machine. Zeroes are capable of remarkable physical feats, including being impervious to gunshots or leaping great heights and distances. Many Zeroes also have augmented body parts, such as limbs or eyes, granting further buffs to their already heightened abilities. A primary characteristic of the Zeroes is their coldness, a result of the procedure, that makes them come off as unfriendly (or even antagonistic) towards humans or even one another (granted, in the latter case, Zeroes tend to be friendly towards one another, as they "recognize" one another). Most Zeroes are treated poorly by Colony residents, from whom they acquired the name "Zero" (it's used mostly as a slur against them), instilling a great feeling of resentment towards their unmodified counterparts. As property of NEXUS, Zeroes have few if any rights and are often "decommissioned" via incineration before they reach the age of 35, though there are some exceptions. All of this considered, it is no surprise that many Zeroes have found a home within Rebellion, using their skills in the pursuit of their liberation.