Maybe you won't need to express it through your character. You might possibly be able to express it through how other characters treat him/her....
You could look at it in a similar way to the Ring in The Lord of the Rings. It doesn't necessarily have its own conciousness but is constantly...
I don't think that a true villain could ever have been a 'jerk'. A proper villain is someone who premeditates crime or attacks and they are...
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