Queen of Hearts

The Queen of Hearts is a villain (of sorts) from Kingdom Hearts and Kingdom Hearts: Chain of Memories.

Kingdom Hearts
The Queen of Hearts was an inter-world "villain" that appeared in a major role in Wonderland, the world based on the movie Alice in Wonderland based on the book Alice's Adventures in Wonderland. Despite insisting on Alice being decapitated for stealing the Queen's heart, the Queen is apparently in no way associated with Maleficent. Also, as she is not entirely evil like Chernabog, the Queen isn't completely a villain, even though she and her Card Soldiers are bosses.

During the said battle, if Sora thrusts forward with the Keyblade when attacking the Queen, she will topple over. This temporarily stuns the red Card Soldiers.

Kingdom Hearts: Chain of Memories
In the Chain of Memories the Queen accuses Alice of stealing her memory and sentenced her to death. After Sora and co. find the real culprit, she still refuses to believe that Alice is innocent. Fortunately, Alices's quick thinking pacified the Queen and no one had to lose their head.

Kingdom Hearts: Chain of Memories
"A selfish ruler who commands an army of card soldiers. A heartless stole her memory, but she accused Alice and put her on trial."