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 Main - Monster history - Cartoon - Merchandise 

Operetta debuted in the cartoon series in the Volume 2 webisode "Hiss-teria", which premiered on September 29, 2011. She is voiced by Gigi Sarroino and Cindy Robinson in the English version of the cartoon.

Volume 2


TBA Hiss-teria Phantom of the Opry The Bermuda Love Triangle Here Comes Treble Monster Mashionals Part 1 Monster Mashionals Part 2

Special webisodes

Kind: The Shockumentary

TV specials

Fright On!

Volume 3


Uncommon Cold Hickmayleeun Night of a Thousand Dots Boo Year's Eve Fright Dance Fierce Crush Flowers for Slow Moe Party Undead Clawbacks The Stich-uation Playing the Boos

Special webisodes

Super Fan

TV specials

Why Do Ghouls Fall in Love? Escape From Skull Shores Friday Night Frights Ghouls Rule Scaris: City of Frights 13 Wishes Frights, Camera, Action! Welcome to Hauntlywood

Volume 4


Operetta is one of the many fans of Clawdia Wolf's stories. Tales from the Script

Just Ghost to Show Ya Join the Scream Stage Frightened Master of Hiss-guise Jungle Boo-gie

Special webisodes

Operetta welcomes Catrine DeMew and another student to Monster High. We are Monster High

TV specials

Freaky Fusion

Volume 5


TBA I Casta Spell On You Gloom and Bloom, Part 1 Gloom and Bloom, Part 2

TV specials

Haunted Boo York, Boo York Great Scarrier Reef


Webisode gallery

TV special gallery


  • In the Volume 5 webisodes, Operetta starts having hair more accurate to the 'Campus Stroll' look of 'Signature' dolls, with the Victory Rolls, having her Signature bracelet on her right wrist instead of her left wrist, and generally looking more accurate, such the hairstyle not having the white streaks or "shiny looking details", and not being a difficult-to-describe shape.
  • In the 'Boo York, Boo York' movie, in her 'Boo York, Boo York - Frightseers' look, she is shown without some sort of masking covering her face for the very first time, much to the delight of fans. This means her musical-shaped "Phantom of the Opera" scarring-looking phantom-birthmark is shown fully for the very first time ever.
  • Also in the movie or TV special, Operetta's sunglasses that she wore with that doll assortment on the doll do not make an appearance at all.

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