Wits
Represents a character's ability to think on their feet, or under pressure. May also to an extent simulate creativity and wit (hence the name).
1: Poor. What should you say? Uh. They already left.
2: Average. You quip and jab back and forth with acquaintances and friends.
3: Good. You can usually get the last word or the last laugh.
4: Exceptional: You have an answer for almost anything.
5: Outstanding: Always cool. Always collected. Always.