You are running out of serious categories, aren't you!?
Furthermore, it is not easy for non-native english speakers to understand slang correctly.
If you mean who cares the least about laws and rules and relations and society ... hmm, usually I avoid playing with such players and characters ... possibly Vvallace.
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P.S.:
Most fluffy = Haraun!
Racist = all the Dermorian Lords, and Drahlian (Dwarvesbane)
Hyperactive = Sarras in her beginnings; and Pirill
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Who is the character with the most interesting profession?