It is very interesting to look at personality from the eight characters, and even the best disguise can't escape people's "eyes."
People who are partial to killing seven people, injuring officials, favoring wealth and robbing money are bad-tempered, unruly, innovative and open-minded. But they are different: the seven killers are ruthless, vengeful and destructive; Injured officials are emotional, unstable, conceited, good at crossing big facts and rebellious; The partisans are sensitive, stingy, indifferent, persistent and mean; Robbers are straightforward, loyal to their buddies, prone to fever, like to take the lead, and possessive.
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There is a detailed explanation in this post