Harmon's most defining feature is likely her unabashed and penetrating looks she gives others-resilient, cold, and fierce/blunt. Since she was young, Harmon has not been easy to smile or frown, wordlessly absorbing information where others rush to fill in the gaps. What she does say comes off as measured and sharp, as if hand-picked for intimidation.

Harmon's auburn hair has been mentioned once or twice as a highlight of her character as well, noting that this feature may make her more or less.