Fido

"[While talking, Olive has sticky tape problem] Fido: He's known for years that you're not like other dogs. He even teases you for having a pet flea. Why is he so upset all of a sudden? Olive: Ever since he was tiny, Tim has loved Christmas… but he thinks there's no Christmas this year. I don't know why. Fido: Are you still gonna give him the slippers? Olive: Yeah. I probably should have chewed them first. [She fixes a problem] [Sighs; Throwing tape away] What I wouldn't give for opposable thumbs."

Fido is Olive's "pet flea" from the Christmas children's book and the adapted TV special Olive, the Other Reindeer.