In his blog post The Great Semi-Colon Debate, author James Scott Bell says that semicolons should be avoided in fiction. I agree to a point, but I wouldn’t ban them altogether. If used skillfully, semicolons can reveal character in dialogue and internal monologue.
In my own fiction writing, I associate certain punctuation marks with the speech patterns of certain personality types. These aren’t hard rules, of course. But here’s my list of punctuation marks and the personality types that go with them.
INFPs and INTPs communicate with the world through extraverted intuition. Intuition naturally sees all ideas as connected. But as introverts, the INPs think before they speak. This combination of tendencies leads to sentences that are long but carefully constructed; the semicolon is the best punctuation mark to communicate this quality.
Comma splices: ENPs