Operetta was trademarked on October 23, 2007, which was eventually abandoned and the name re-trademarked on November 17, 2011. Her first doll came out in Mid January, 2012. As of January 01, 2015, her doll number totals 13 and makes up 3.82 % of the entire Monster High doll collection. Few other merchandise of her is available.
- Operetta wears a purple and black houndstooth sleeveless blouse with white buttons down the front. Over the blouse she wears a short white jacket with black spiderweb patterns around the arms and on the back, and short, puffy sleeves ending in keyboard print. The blouse also features a skullette button. She sports jeans that are rolled up to below her knees and feature red lining. Her belt is white with black musical notes print, a spiderweb-style buckle, and three black chains with musical note-shaped charms haning from it. Operetta's shoes are black and white with white shoelaces, a spiderweb pattern, and treble clef shaped black heels. She wears a white bracelet with a keyboard print on her right arm and a black dice ring on her right hand. Her earrings are different from each other; her left earring is the six-dotted side of a black die and her right earring is the five-dotted side of a white die on a string. Around her left eye she sports a black, translucent mask in the shape of a heart-themed musical note.
- The doll comes with a red, black and silver guitar case with white spider web patterns, a Memphis "Daddy O" Longlegs figurine, a real-life sized black brush, a black doll stand and a diary.
- Operetta's stockphoto shows her with a purple brush, implying she comes with a purple doll stand. The doll has never been put on the market with those. Also, her stockphoto erroneously shows a set of bracelets that actually belong to Howleen Wolf's 'Campus Stroll' outfit.
- Operetta's fashion pack consists of a top, a skirt, a belt, a red and black bag with a red spiderweb on the front, shoes and red spiderweb detailing. The top is black with purple lace detail and short stripy black and white straps. A long white skirt with black music notes is worn with the top. There is a red spiderweb on her right strap, two others form a sort of belt. Operetta`s shoes have a mix between the music note detail and the stripy detail. The sunglasses are black with red spiderweb detailing on the sides. Her bag is also red and black and it has the Monster High skullette logo, it is designed to look like an old vinyl record.
Skultimate Roller Maze
- Operetta wears a white dress with purple, neon green and yellow records. Her dress has a high black collar which leads down to the belt which is another record, her roller skates are white with purple at the bottom and have red and green wheels, her knee pads are black and her helmet is black with music note patterns on it. Her hair is pulled back into a ponytail with green highlights along with a neon green stand.
Dot Dead Gorgeous
Operetta wears a white full-skirted sheath dress with black polkadots and the skirt has another layer made of chiffon fabric that is red and has a black disc pattern on it and has wide red straps with black polkadots. She also wears a belt that has a piano-design and her shoes are red and black wedges with dice on the straps and spiders clinging to the backs. Her accesories include a layered pearl necklace with three black music note charms hanging from it as well as a white spiderweb charm in the middle, an earring that is supposed to be a silver spiderweb, her signature white heart-shaped mask only this time part of it is in the form of a spiderweb and is connected to a another earring that is a white bow with a pearl in the middle, a red iCoffin, a red coffin-shaped makeup pallet, and a piano-patterned purse. The doll comes with a silver brush, a silver stand, and a picture. Her bangs are rolled up and the rest of her hair is curled and held back with a red bow covered with black dots and has a skullette in the middle. One of her arms is clean while the other is tattoed with purple and red swirls and two red treble clefs as always. Her lips are deep red and she keeps her smoky eyes.
Killer Style II
- Line: Dance Class
- Release: Late October, 2012; Late July, 2013
- Assortment number: Y0430; None
- Model number: Y0433; BBR89
- Operetta wears a black leotard with patterns of white dice with red dots on the fabric. Her v-neck leotard is secured by two red ribbons as shoulder straps. Her swing dance skirt is opaque white with black spider web designs. Her shoes are black toed lace-ups with piano keys on the heels. Her accessories include a red duffle bag with record discs at the sides, a musical note chain for a handle, and musical notes and spider web details on the body; a pearl-rimmed, heart-shaped mask which is amethyst purple and attached to a spider earring by outward-stretching spider webs. Her hair is pulled back by a purple and white gingham ribbon. She has smoky eyeshadow and bright red lipstick. The artwork never contained a ribbon.
My Wardrobe and I
- This fashion pack comes with two and a half outfits for Operetta. The first outfit is a white dress with a purple spider web and music-note pattern. The second outfit consists of a red halter top with a music note and heart patterned collar and a black pencil skirt with white, dotted music lines on it. A purple stretch knit vest with a red heart-shaped curlicue on the left is included for both outfits. Accessories include a red dice belt, a bleeding heart mask, heart/music note hybrid earrings, and a purple ball clasp purse with piano keys for a strap and four dots on the front. The red spider web shoes have white soles and dice for heels.
Operetta wears a sassy new look for her picture - she wears a purple jacket adorned with black and purple stripes on the bottom and a Monster High insignia on the left side. It has white elbow sleeves with matching black and purple cuffs. She wears a red dress which is printed with black musical notes, and black corset with printed ties is at her abdomen. Black polka dotted translucent mesh covers half of the skirt starting from the waistline, and the dress is hemmed with lilac mesh. She accessorises with a red beaded bracelet on her right hand, a black dripping purse with a red heart in the center, and white boots with a red backing, black toes, three black buttons on each side of a boot, as well as black fishnet socks. She has two mismatched earrings - her left one is a red design with two beads dropping from the main design, and her right is two black records. Her mask is reused from her Dot Dead Gorgeous doll, but is depicted as a dripping, triangular black spiderweb in the stockphoto. Her fringe is curled into a victory roll, and her hair is pulled into a high ponytail, tied with a loop of hair.
She comes with a black hairbrush and doll stand, magenta doll-sized folder, and a Fearbook.
Frights, Camera, Action! - Hauntlywood
- Line: Frights, Camera, Action! - Hauntlywood
- Release: Mid February, 2014
- Assortment number: BHM96
- Model number: BHM96
Doll: Operetta's got both red and black hair, which is kept apart. The red hair is of medium length and hangs down her back loose, while the black hair covers the scalp and is tied into a ponytail to the right. She has straight-cut bangs, grey eyeshadow, and red lipstick. Additionally, her hands and forearms sport molded-on gloves: a white one on the right and a black one on the left.
Clothes: The doll wears a knee-length dress with a red top held up by black straps. The upper edge of the top holds a strip of red sheer ruffles. A broad black strip with sections of piano key print is wrapped around her middle, from which an upper skirt with warped piano key print flows. Underneath is another skirt made of red sheer with a dripping music sheet print in black.
Accessories: Her open shoes are all-black with heels made out of five stacked-up dice. There's a single strap going over the toes, which just like the heel cup features spiderweb decoration. Atop each bridge is a single bow. The mask covering her left eye is a veil of black fishnet hanging from a headpiece in the shape of a large, white, dripping heart with a die's five side carved into it and a black sheer bow attached to the back. Her earrings start with white studs modeled like halved spiderwebs and from them hangs a drop of piano keys each. A black V.I.M. badge hangs from her neck and there's a bracelete of piano keys on her left arm. Operetta further comes equipped with a black coffin-shaped camera with a silver spiderweb-covered flasher and a fan-shaped piano key purse with a black beaded strap and strings of black beads hanging from every other key.
Extras: This doll comes with a black doll stand and brush as well as a diary.
Notes: There is nothing of note about this fashion pack's availability or stockphoto.
I Heart Accessories
Doll: This Operetta has a pinkier tone in her hair, that is styled in a ponytail with a slight bump in the head. She wears red lipstick and red eyeshadow fading to black.
Clothes: She wears a pair of dice/domino knee length slim trousers, in white and pink. As a top she wears a black short sleeved jacket, with a large pink fold and spider web patter in the chest part. The jacket is tied by a sheer pink bow.
Accessories: This doll comes with a big range of acessories. She has her signiture mask in white, as well as a swirly earring, a black belt with dices, a purple and black handpurse with a piano inspired shape, a gym bag in white with red note details, lilac shoes with white soles and a sheer bow that ties around her head.
Extras: This doll comes with a stand and brush.
Freaky Fusion - Fusion-Inspired Ghouls
- Line: Freaky Fusion - Fusion-Inspired Ghouls
- Release: Early July, 2014
- Assortment number: CBP34
- Model number: CBP37
Doll: Operetta wears light pink lipstick and grey eyeshadow. Her hair is loose and straightened and the black part of her hair is parted back, to imitate Frankie Steins signiture hair style.
Clothes: She wears a short dress with plaid pattern that is actually a music score, and a tie wrapped around her waist. The dress has a white stripe in the middle, with silver buttons, and half of the dress is black and the other half is pink.
Accessories: She comes with a silver ray shaped headband, a bolt red bracelet, a mask inspired by Frankie's stiches and a shoker with bolts sticking out. She wears heeled red shoes with the front part painted black and missmatching tights, one pink and the other black. She is also wearing a pink recast of signiture Frankie purse.
Extras: This doll comes with a yellow brush.
Boo York, Boo York - Frightseers
- Line: Boo York, Boo York - Frightseers
- Release: Late May, 2015
- Assortment number: CHW64
- Model number: CHW56
Doll: This Operetta has her red hair pulled in a ponytail and more spread black stips. She wears bright red lipstick and pale purple eyeshadow.
Clothes: She wears a shiny red top with a V clivage and a skirt that features graffiti art in a white background and is longer in the sides.
Accessories: She comes with crystal sunglasses, with a big quarter note, a crystal purse crytal shoes,all featuring a pale purple colour.
Extras: She does not come with any extras.