Nobodies

Nobodies are the natural counterparts to The Heartless. When a Heartless is created, the body and soul that are left behind usually die. However, if that person had a strong heart, their body and soul may continue to live on as a new being called a Nobody.

Most Nobodies lose their human form, appearing as white, humanoid monsters. Most Nobodies also lose their memories and sense of self, and act on instinct, similar to the Heartless. However, even base Nobodies tend to be more intelligent than Heartless. The two are natural enemies, but will work together when guided by a higher power.

When a person with a particularly strong heart becomes a Heartless, their Nobody can retain its original human appearance, intelligence, and usually all of their memories. The members of Organization XIII (link?) are Nobodies of this type, and they command the lesser Nobodies to do their bidding.