Zeros

Zeros are a relatively new invention of the Retrieval Squad. Capable of surviving Blanc the barehanded and equal to the strength of an entire hunting party, Zeros generally are much stronger than most Claymores. Zeros contain the power of an Awakened Being and have a black, near indestructible core which contains their being. Zeros can live on if their body is destroyed, being re-implanted into the body of a dead trainee after going into "panic mode" which absorbs the body's seasoning and adds it to the Zeros core, destroying the body. Zeros can also liquify themselves for easier transport. Each Zero has a suppressant collar as well. This collar is made of a suppressing material with a wheel to determine the amount of yoki to use. Zeros can use up to 95% of their full power, reverting into an awakened form for combat. Zeros can only be made with a few types of awakened flesh, the majority being too incompatible to work as a core. The awakened form taken seems to be a combination of the host's form and the core's form although this is largely speculative at this point in time.

The Zero project has been ongoing for the last 200 years.

Zeros have both a yoki amplifier and suppressor. The amplifier allows them to use 95% at will and semi-awakened. The suppressor allows them to retain a human mind and also acts as a precaution to control them and doesn't allow them to use 100%.

Zeros' past lives and current information can't be found anywhere, even in the black Archives.

Zeros are often mentally unstable, having to share their personalities with their implants and take their awakened form. Hosts for the Zeros must have high mental ratings to be used.

Zeros 1-5 have the body in charge while Zeros 6-10 have the cores in charge.

Zeros have an aura which can be described as inky or cloaked. Many zeros seemed to have run into either Eternals or notorious awakened beings like Sullivan or Deborah.

It is unknown whether or not Gloria was a prototype for the zeros although it seems likely. Ceres may have been one as well.