But in his toy shop, Santa hides his 10th reindeer (if there is a 13th warrior, why not a 10th caribou? And most of them might be female anyway: https://healthcare.utah.edu/the-scope/shows.php?shows=1_tleifcjy ) Feel free to give her a name, and after Dancer and Prancer it could well be Flasher - for her desire to take her clothes off, but anyways, Santa calls her Darling - at least when Mrs. Kringle is not around.