No-Face is a lonely spirit who begins to follow Chihiro Ogino after having developed an interest in her sincerity. His vocabulary consisted of grunts and moans as opposed to coherent words. Not knowing much about the Bathhouse or about other spirits in general, No-Face learned by example and adapted to his surroundings.
Exposed to the corruptive thoughts and greed of the workers, he quickly grew to encompass their personalities, hoping that his endeavor to be like those around Chihiro would eventually garner her affection for him. While this ultimately brought upon the opposite effect, Chihiro was somewhat true to No-Face after she invited him and accepted help from him.