When the Wipe-off Incident occurred, in order to save the Dolls' neural clouds from destruction, Antonina had to pack them up in an extremely small amout of time and scatter them throughout Magrasea. Due to the limitations of the Neural Cocoons, she was forced to break the neural clouds into fragments before sending them off.
Neural clouds with missing neural fragments are incomplete and are only capable of basic combat and conversation. They cannot reach their full potential, and are only a part of a whole.