Transformation of a character is mainly a key factor of the story.
In most of the stories the character that has most of the evils in it is then transformed.
It becomes a good person because of all the punishments he/she had and then leads a simple life.
If there are some bad deeds by an evil character then punishment can create transformation in their personality.
They may become a good person and promise not to do such bad deeds again ever in life.
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