First Appearance: KINGDOM HEARTS χ[chi] (2015)
Origin: Alice in Wonderland (1951)

The Mad Hatter is absolutely mad in every imaginable way, and that's exactly how he likes it. The less sense things make, the better! 

He spends his days having enjoying the company of the March Hare in their Tea Party Garden, celebrating their Un-birthdays and downing cup after cup of steaming hot tea. You're more welcome to join in their celebration, but a party that began with two will only end with two, so it may not be worth your time anyways.