Lucy is bossy, selfish and opinionated, and is used to deliver commentary on offence and honesty, as well as sarcasm. Schulz described Lucy as full of misdirected confidence, but having the virtue of being capable of cutting right down to the truth. He said that Lucy is mean because it is funny, particularly because she is a girl: he posited that a boy being mean to girls would not be funny at all, describing a pattern in comic strip writing where it is comical when supposedly weak characters dominate supposedly strong characters. Lucy at times acts as a psychiatrist and charges five cents for psychiatric advice to other characters (usually Charlie Brown) from her "psychiatric booth", a booth parodying the setup of a lemonade stand. Lucy's role as a psychiatrist has attracted attention from real-life individuals in the field of psychology; the psychiatrist Athar Yawar playfully identified various moments in the strip where her activities could be characterised as pursuing medical and scientific interests, commenting "Lucy is very much the modern doctor".