Playing Card

The Card Soldier is a soldier who serves the Queen of Wonderland in Kingdom Hearts and Kingdom Hearts: Chain of Memories. The Card Soldiers serve her unquestionably and carry out every order, always afraid of being beheaded. They serve as a member of the boss fight against the Crank Tower and Queen of Hearts in Wonderland.

Kingdom Hearts
''Spear-carrying guards who serve the Queen of Hearts. They fear the short-tempered queen and are careful not to irritate her.''
 * Cards (Hearts)

Marched onto the scene in "Alice in Wonderland" (1951).

''Troops with heavy axes who serve the Queen of Hearts. They fear their short-tempered queen, and are careful not to irritate her.''
 * Cards (Spades)

Marched onto the scene in "Alice in Wonderland" (1951).

Kingdom Hearts: Chain of Memories
Guards in the service of the Queen of Hearts.
 * Card of Hearts

They fear her temper and will do anything she orders.

Guards in the service of the Queen of Hearts.
 * Card of Spades

They fear her temper and will do anything she orders.

Kingdom Hearts
In the first game, the Cards can be seen alongside their Queen during Alice's trial. After Sora and his friends find proof of Alice's innocence, the Cards attack them by order of the Queen, who doesn't believe she is innocent. When Alice is kidnapped, the Queen orders the Cards to search everywhere for her, but they don't succeed, since Alice is no longer in Wonderland.

Kingdom Hearts: Chain of Memories
In Chain of Memories, the cards appear as figments of Sora's memories in Wonderland. They are fought again alongside the Queen of Hearts, and when defeated, Sora obtains their Enemy Card.

Kingdom Hearts 358/2 Days
The cards reappear to help the Queen of Hearts patrol the hedge mazes.

Kingdom Hearts coded
The cards will reappear in this game, as shown in a new screenshot, near Alice when she's talking to Sora.

Origin
Along with Alice, the Queen of Hearts, and the other inhabitants of Wonderland, the Card Soldiers appear in Disney's Alice in Wonderland. A larger amount of cards appear in the movie than in the game. The playing cards make up a very large army for the Queen and King.