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Occupation Muse of Music (former)
Voiced by Kathleen Barr
Barbie & The Diamond Castle

Lydia is an evil sorceress and the main antagonist in Barbie & The Diamond Castle. She is voiced by Kathleen Barr.

Lydia was a Muse who had fallen from grace, having turned against the other Muses for selfish reasons, and sealed her degradation from a good spirit of music into an evil witch by transforming her flute into an instrument of powerful dark magic. Along with Slyder, she travels to capture Melody and find the Diamond Castle.


Lydia was originally a Muse of the Diamond Castle, working closely with the other two Muses - Dori and Phaedra - to take care of the castle and create music. However, she became insanely jealous of her friends, wanting to be the one and only Muse.

Dori and Phaedra disagreed with her, believing that music was for everyone. A scorned and furious Lydia stormed out of the Diamond Castle, with the vow that she would return and have the castle all to herself.

She found an ancient cave filled with magic, and transformed her flute into an instrument of a dark magic so powerful that it could do almost anything she willed it to do. With her dramatically-enhanced powers, she planned to take over the Diamond Castle, and from there conquer the world piece by piece.

Dori and Phaedra hid their own magical musical instruments along with the castle, and entrusted the key to Melody, their apprentice, in case anything bad happened to them. They then went to see Lydia and tried to reason with her, but she simply turned them both into stone statues. Melody managed to narrowly escape by magically hiding in a mirror.

When her minion, Slyder, detected Melody's presence, she tracked her down, trying to get the mirror so she can find where the Diamond Castle was hidden.

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, turning her and Slyder to stone.

Physical Appearance

Lydia has reddish-brown hair that is piled atop her head, fair skin, and slanted green eyes. She wears a gown of dark red and black, and around her neck is a necklace that is shaped like a snake biting its tail. She is always seen with her flute, the colour 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.


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


LogoBMW Barbie Movies Wiki has a collection of images and media related to Lydia.
Barbie & The Diamond Castle
Barbie & The Diamond Castle Digital Copy

Quote: "Friendship is the true treasure."

Media: Barbie & The Diamond Castle | Soundtrack

Characters: Alexa | Barbie | Dori | Glimmer | Ian | Jeremy | Liana | Lily | Lydia | Melody | Muses of Music | Phaedra | Slyder | Sparkles | Stacie | Teresa

Objects: Magic Mirror

Locations: Diamond Castle | Liana and Alexa's Cottage | Mansion | Valley of Flowers

Songs: "Believe" | "Connected" | "Double Vision" | "Two Voices, One Song" | "We're Gonna Find It" | "Wonderful Me"

Other: Merchandise | Credits

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