Skelita Calaveras is a 2012-introduced and all-around character. She is a skeleton and a student at Monster High. Born and raised in Campasuchill, Hexico in a warm and supportive houshold, Skelita chose to take a risk and leave the nest. She set out on her own after befriending fellow fashion designers Clawdeen Wolf and Jinafire Long in Scaris and traveled to the Boonighted States of Scaremerica to share classes with the both of them. Skelita is a strongly family-oriented girl, drawing inspiration from her heritage whenever she needs to be creative. She is now embraced to the high school way of life at Monster High, and she even is official guardian of the cementaries. 
She is voiced by Laura Bailey in English.
She is voiced by Lety López un Latin American Spanish.
She is kind, gentle and soft-spoken, which would put her at a disadvantage if not for her ability to win people over with her passion. Though she can be a little insecure and diffident at times, her passions, and her family, give her strength to do the things she loves. Friendly, tireless, creative and with a great sensibility to the arts, Skelita is always willing to lend a hand and wise words to her friends. Her family is the most important thing to her, and she loves making them proud since she herself is very proud of her ancestors, being in her own nature to celebrated them, with her favourite celebration, El Dia de Los Muertos.
Skelita's body consists primarily of bones, though she has curled black hair with marigold streaks and brown eyes. Her face resembles a sugar skull and she has visible black vertical lines on her lips. She likes to dress in classical clothing with a hint of Mexican imagery and cultural references. Her necklace was given to her by her abuela.
Skelita has little special abilities, due to her being an undead creature rather than a powerful one, however:
- Bone Perception: Whenever something big is about to happen, Skelita feels a chill through her bones that causes her both discomfort and awareness. However she isn't able to predict when the happening will occur. It is unknown if this ability is for all skeletons or only Skelita's.
- Tailoring: Skelita is an incredibly fast tailor and can sew a dress within seconds.
Based on artwork of Skelita, her family consists of a mother, father, younger brother, grandmother and herself. All of them are skeletons. Her sketchbook also mentions she has a grandfather, either paternal or maternal, that is part of a mariachi band, Los Dedos Locos, an aunt named Catrina and at least one cousin, who had recently celebrated her Quincenscara. Skelita's family lives in a hillside cemetery in the jungle, in Campasuchill, Mexico , while an aunt and uncle have a house at the beach She also comes from a long line of Calaveras, whose ancestors include Bonempak, who was a Chefe de Brujaria (witch doctor) back at her time, around the Mayan era and her Grandmother and Great-Grandmother are also known to have lived during the Western era.
A grandmother has appeared in "Scare-itage", presumably the mother of Skelita's father. She may or may not be the grandmother in the picture in Skelita's diary, who looks more like she'd be her mother's mother.
Skelita has a special place in her heart for her grandmother, who she loyally wants to impress and follow in her footsteps. Skelita goes as far as claiming that her 'Abuela' and her are very much alike, with equal interests, and also considers her her best friend. Skelita loves her grandmother dearly and the feeling is reciprocal, considering Skelita was the chosen one to carry on the most especial heirloom, the necklace made from volcanic gems.Her grandmother is also into pottery and urn making.
Her grandmother and her also do a lot of activities together, which Skelita highlights Dia de Los Muertos preparations as her favourite. She feels special when doing so, but when her little brother started to help both with the preparation shores she inicially felt dissapointed and jealous of him, for getting grandmother's attention and ruining their special moment, but soon she realized that sharing the happy moments was the best thing to do. 
According to her biography she is friends with Jinafire Long and Clawdeen Wolf. Her relationship with Jinafire wasn't the best in the start, for Jinafire was way too concentrated on her work to have fun but now they're pretty much insaperable, sharing their interests in designing. This is also the reason why Clawdeen and her get along so well, though Skelita has expressed her fear of werewolves due to the fact she is made of bones, which makes her a little anxious around canines.
In her diary, Skelita mentions having a pet butterfly named Nati. The Calaveras household also contains a skeletal dog. On the website profile she mentions that millions of Monarch butterflies are also her pets when ever they visit back from winter.
- June 21, 2012: Amazon puts up a list of upcoming doll lines, revealing the existence of Skelita Calaveras. Possibly taking this as a 'Go', photos of the dolls are released by Monster High Parents. Mattel responds immediately with an order to Amazon to remove the listings and a grand scale internet order to remove the images on account of copyright infringement. Evidently, the information was not yet to be revealed.
- June 26, 2012: Mattel registers the trademark for Skelita Calaveras.
- July 13, 2012: Skelita Calaveras debuts at San Diego Comic-Con International.
- July 13, 2012: Skelita Calaveras's profile art is revealed.
- November 1, 2012: Mattel introduces Skelita Calaveras fully on Facebook and Tumblr.
- Mid November, 2012: Skelita Calaveras's first doll is released as part of the Scaris: City of Frights series.
- December 13, 2012: Skelita Calaveras's profile is published on the Monster High website.
- Early 2013: Listings for Skelita, most notably those of Argos, refer to her as Skeletrina Calaveras.
- March 3, 2013: Skelita Calaveras makes her 3D cartoon debut in "Scaris: City of Frights".
- March 21, 2013: Skelita Calaveras makes her 2D cartoon debut in "Scare-itage".
- April 2, 2013: Skelita Calaveras makes her Ghoulfriends book debut in Ghoulfriends Just Want to Have Fun.
- "Skelita" is a cross-language portmanteau of "skeleton" and the suffix "-ita". "-ita" is Spanish and denotes the diminutive female form of a word, meaning that Skelita's name roughly translates to "little (female) skeleton".
- Skelita is based on the family background of Natalie Villegas, the designer.
- Skelita is not fond of werewolves because she claims that they sometimes try to chew her bones and it is not comfortable to her.