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Lydia is the main antagonist of the 2008 direct-to-video animated Barbie film Barbie & The Diamond Castle.

She was voiced by Kathleen Barr, who also voiced Laverna in Barbie: Fairytopia series, Eris in Barbie in A Mermaid Tale series, and Gwyllion in Barbie: Mariposa series.

Role in the film


Lydia was once one of three muses of the Diamond Castle, but was jealous of the other muses, wanting to be the only one. After Dori and Phaedra told her that music was for everyone, she vowed to have the Diamond Castle all to herself. Sometime later, she found an ancient cave filled with dark magic and used its powers to transform her instrument. The other muses hid their instruments along with the castle and gave their apprentice Melody the key before confronting Lydia. When they tried to reason with her, she used her flute's power to turn them to stone. Slyder, Lydia's dragon, saw Melody and attempted to pursue her, only for her to hide in a mirror that she became trapped in due to her flute being lost and broken.

Barbie & The Diamond Castle

When her dragon minion Slyder, detected the presence of Melody through her singing, he informed Lydia that Melody was alive and she ordered him to find her. He tracked her down to Liana and Alexa's cottage, but could not find her. He reports that there were two residents living there and she then orders him to take her to them.

Lydia attempted to trap the girls in a mansion by hypnotizing two residents that lived there, but only succeeded in catching Alexa. Slyder kidnapped Liana and took her back to the lair.

Lydia used her flute on Alexa and made her almost fall off a cliff into boiling hot liquid, but Melody saved her by confessing where the Diamond Castle was. Liana and Alexa followed Lydia and defeated her, and found the Castle. They saved the muses and used their music to defeat Lydia forever.


Lydia is an extremely cruel, cunning, deceitful, manipulative, villainous, and selfish woman who will stop at nothing to achieve her goals. She is also extremely prideful, cocky, arrogant, and presumptuous, believing that she was perfectly capable of being the one and only Muse, and that her magic made her invincible.


Lydia has reddish-brown hair, fair skin, and green eyes. She wears a maroon and black gown, and around her neck is a necklace that is shaped like a snake biting its tail. Her hair is piled atop her head. She is always seen with her flute, the color of which was silver and white before her fall from grace turned it into red and black.

However, in the junior book of the movie, it was shown that Lydia originally wore a white and gold Grecian gown similar to those of Dori's and Phaedra's.



  • She speaks with a British accent.
  • She also appearing in the film bloopers.


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