In "The Blood of Olympus," a humorous exchange takes place between two characters, Percy and Leo. Percy mistakenly associates the zodiac sign with his own identity and claims to be a Leo. This leads to a lighthearted rebuttal from Leo, who clarifies that he is the Leo of the conversation and that Percy is actually a Percy. This playful banter highlights their friendship and the differences in their identities amidst the larger narrative.

The dialogue serves not just as comic relief but also reinforces the theme of individuality among the characters. Each person in the story has distinct traits and strengths, which contribute to their teamwork and adventures. Leo’s quick response reminds readers that while they may share certain traits or elements, each character is unique in their own right.