"Who are you and why are you my cat?" is a thought-provoking quote from Rick Riordan's book "The Red Pyramid." This line captures a moment of introspection from the characters, reflecting the confusion and surprise that can accompany unexpected relationships. It encourages readers to consider their connections with others and the mysteries that come with them.

In "The Red Pyramid," the characters embark on an adventure that uncovers hidden truths about their identities. The quote emphasizes the theme of discovery, as they navigate the complexities of family, friendship, and the supernatural. Riordan weaves a narrative that presents not just action but also a deeper understanding of belonging and identity.