In the following time, Belle carefully observed the worm that controlled her warrior. Its thinking indeed lacked flexibility and seemed somewhat slow-witted.
And the reason was not understood until one day.
The warrior in which Belle resided had joined a secret society, which was also established with the purpose of overthrowing the Emperor. However, the master of this society was not controlled by the worms, and this warrior wished to make use of the society.
To join this society, there was one condition: one must remove their armor and meet with one's truest self. This was to prevent betrayal. Within this society, there were also the White-skinned infected by the worms, but compared to the one Belle controlled, their thinking was much more agile! Belle took note of its fluctuation characteristics, and later, when she encountered the armored worm, she found its thinking to appear sluggish once more.