The Grand Duke, or simply Duke, is a character from Disney's classic film, Cinderella. He made his debut appearance in the Kingdom Hearts series in Kingdom Hearts Birth by Sleep. A loyal servant of the King and Prince Charming, he desperately searches for the maiden that left behind a glass slipper at the Prince's royal ball.
 Kingdom Hearts Birth by Sleep
Eventually coming before the young Aqua, a Keybearer from outside the Castle of Dreams, the Grand Duke had the girl try the slipper, also bringing her before the Prince. Yet this was to no avail, the true maiden who fit the slipper, Cinderella, discovered and marrying Prince Charming to live on happily ever after.
The Grand Duke is a thin man that dresses in a high-collared, lilac jacket with pants of the same color. He wears a tasseled, silver pauldron on each shoulder, a silver belt with a blue, seemingly jeweled buckle, a red sash over his left shoulder and right hip, and a monocle on the right side of chest for his right eye. In terms of facial features, the Duke has thinning, black hair with thick mutton chops that form a thin mustache. He has black eyebrows and small, close-set eyes. His neck seems slightly longer than usual, and his nose is a bit large.
The Grand Duke first appeared in Walt Disney's classic 1950 film Cinderella. Sharing a similar role as in Kingdom Hearts Birth by Sleep, he serves the King as his right-hand man. This unfortunately leads to death threats and other forms of pain being mentioned when the King loses his temper. Despite this, there is no love lost between the duo, the klutzy Duke always given a second chance. When the glass slipper belonging to Cinderella was left behind, he was sent on a desperate search to discover the girl for Prince Charming to marry after the royal ball.