Mad March

Mad March, previously known as the March Hare, is The Queen of Hearts favorite assassin. Though he was dead long before Alice came to Wonderland, he was resurrected when the Queen desired his assistance in locating Alice and Hatter.

Background
At some point he died and the Queen of Heart had the Walrus and the Carpenter try to bring him back to life. Though they were able to regenerate most of his body he was still missing his head. The Queen wanted him completed within a hour even though regenerating his head would take a week. To compensate they replaced his head with a mechanical porcelain rabbit one.

He is ordered to track Alice,who allows herself to be trapped in order to take Jack back in exchange of the Stone of Wonderland. He captures Hatter when he tries to save Alice. He is killed when Hatter breaks his mechanical porcelain head.