* The Queen of Hearts: She's known for throwing temper tantrums and beheading people who displease her, so it's likely she'd rather be at her own croquet game.
* The King of Hearts: He's often seen alongside the Queen, so it's safe to assume he's also not at the tea party.
* The White Rabbit: He's always in a hurry and probably too busy to attend a leisurely tea party.
* The Cheshire Cat: While he appears and disappears mysteriously throughout the story, he's not present at the Mad Hatter's tea party.
* The Dormouse: Although the Mad Hatter mentions the Dormouse, he's not actually there.
It's important to note that the Mad Hatter's tea party is a chaotic and ever-changing event, so there might be other characters who are momentarily absent or even appear and disappear unexpectedly.