Elbow Princess makes her first appearance in the episode, "Princess Monster Wife." Her head appears to be an arm, which is why she has the name. She is one of the princesses to have a missing body part in the episode, which was a small part of her right hip.
She has a right-hand arm sticking out of her head that bends to her left side. Her skin is a grayish blue-green and she doesn't have a neck. She has a golden band around her head just before her arm that has a diamond-shaped ruby in it and that is probably her crown, she is the only princess with a different crown due to her being an arm. Her dress is a floor length pink V-neck that has a red ochre-colored design around the bottom.