Who knows the information, background or origin of the monster Kaonashi in Spirited Away's animation?

Kaonashi, a mysterious ghost, was black and wore a white mask.

From the beginning, I was interested in Hanazono Sakura on the bridge in front of the bathhouse.

At first, only money could see him. Thinking that he was a guest in the bathhouse, he was let in to take shelter from the rain, which deepened his love for money. But he was gradually influenced by money and secularism in the bathhouse, and became a monster who could change magic into gold, eat constantly and even eat people. Because he eats people, he still has the ability to speak. Finally, under the guidance of Chihiro, he spit out what he had eaten and returned to his original appearance. He left the bathhouse with him and became Qian's assistant. This role is considered to have a strong symbolic significance, and some people think that the process of his change is a portrayal of human nature being polluted by the dark side of society.

Kaonashi was attracted by Chihiro's innocence. It can be clearly seen from the following paragraph that Kaonashi is a very special figure, symbolizing emptiness and loneliness, and it is the most primitive, and there is no distinction between good and bad. When a faceless man sees Chihiro, what kind of innocence attracts him is also a primitive demand. But at the same time, a desire to build relationships with others gradually evolved into possessiveness, and he wanted to build relationships through money. Money seems to make the faceless person no longer lonely. However, by devouring others, it is not only his body that expands, but also his emptiness and loneliness. In the end, what faceless people want most is the innocence of Chihiro, a relationship that cannot be established through money. Another interesting thing about Kaonashi is that he can't talk before he enters the bathing place. After entering the bath, he ate the frog, melted into a frog and became greedy, and began to speak, expressing his thoughts and the frog's greed ... As mentioned above, Kaonashi longed for Chihiro's innocence, which could not be solved by money. Therefore, what Miyazaki Hayao wants to express is the opposition between nature and civilized society, and man is in civilization.