me: There's actually nothing in the D&D rules about your ability scores affecting your characterization/roleplay.

"But what about Charisma? You have to roleplay Charisma."

Charisma doesn't change how your character acts. It changes how other characters react.

You try to persuade the monarch by offering up a bunch of good points strung together in a logical fashion.

Does the monarch think you're an annoying know-it-all trying to tell you their business, or a wise sage who counsels from an outside perspective?

Depends on your roll.

And your roll, of course, is modified by your Charisma score (and possibly proficiency).

Same behavior. Also even possibly same character in two different situations, because dice. Different reactions.

Your Charisma doesn't dictate how you act.

I do have a player at my table (outside the Quarantimes) whose character is a misanthrope and he will loudly proclaim "I have to act this way, it's my Charisma score." and I said something only once, for accuracy, because the truth is this is the character he wants to play.

The same character, with a higher Charisma, would be just as much a misanthrope but would be more compelling. People would be more likely to leave when he tells them to, to assume he *does* know best when he insists. They might not like him but wouldn't be able to ignore him.

Yes. This is why it's the default casting stat for any creature that just *does/is* magic. https://twitter.com/animaphonics/status/1260916214622228480

Think about a character like House or BBC Sherlock. A lot of people's immediate read would be, "Well, that's a low Charisma character. They get by on intellect."

How do you think that happens?

The low Charisma version of Sherlock doesn't ever get into the crime scene, much less having multiple people who are basically willing to die for him.

You can bring up other problems with Charisma like "what even is it?" (note that I'm not asking, I'm not interested, I don't care, I am not just apathetic to your insight on this but antipathetic) and if it's too nebulous or too general or rooted in unfounded assumptions, etc.

But on the specific questions of stats vs. roleplay... a high, low, or middling Charisma does not dictate that your character *acts* a certain way. It influences how other characters receive them.