no bod y [no-bod-i]
pronoun 1. no person; not anyone; no one: Nobody answered the phone.
noun 2. a person of no importance, influence, or power.

This is what the universal definition is of a nobody, but that's not what Kingdom Hearts defines them as. If a person with a strong heart becomes a heartless, a Nobody is born. A Nobody is an empty shell that has no heart, but can feel through their memories of their past life. They are only half a person.

Sadly, this is what Naminé is. Though Kairi--her other half-- did not become a heartless from the purity in her heart, it created something new. A special Nobody, with unusual powers. Instead of being able to control an element, she has no fighting instincts. All Naminé can do is control the memories of the Keyblade master. These unique powers is what drew the Organization into capturing her.

Even though Nobodies can't truly feel emotions, that doesn't mean they don't remember how too. Naminé can still love, feel angry, loneliness, and so forth.