Fierce Caste

• AGE: 19.
• FAVORITE FOOD: Tomatoes and monstera cheese with balsamic vinegar.
• FAVORITE ACTIVITY: I'm an artist. I love being on stage, in the spotlight, with an audience watching me. There's nothing like it. And that's all I want for myself.
• KILLER STYLE: I like ribbons and buckles among black and purple outfits, with touches of sparkle!
• PET: I can't have a pet because everyone would think "How cute! Was he a fan that you turned into?"
• THING THAT ANNOYS ME THE MOST: "Fans" who arrive late and leave early. If you're going to my show, please arrive on time and stay until the end. It's a distraction, especially for the real fans who really want to be there. If it makes me look like a diva, I can live with it!
• MONSTROUS SAYING: I have to sing the correct lyrics in my songs or I run the risk of turning the audience into frogs and... well... let's just say frogs don't usually ask for an encore.

• Magic: As a witch, Casta is able to cast spells and perform magic. Her magic manifests as violet orbs, and when she used her magic on the potion, her hands glowed.
• Animal Transformation: Like her mother, Casta can transform others into animals. She has very limited control over this power and can transform others into animals by saying a misspelled word or phrase. Like all witches, she can also transform others into animals by casting a spell.

Casta is a close friend of Catty Noir, a younger singer who took a break from her career to return to normal life. Casta is also reportedly close to her bandmates. She is also Operetta's best friend.

Casta Fierce is the daughter of Circe, the goddess of magic. Like her mother, she can transform people and other monsters into animals. Casta and her mother appear very close as her mother watches her performance at Monster High, and in a flashback to a younger Casta, she is with her mother.

Casta is Spelldon's older sister, he has accompanied her to Monster High.

Casta shows concern for her fans and willingness to fulfill a request made to her by them. She also gets embarrassed on stage and casts a spell that accidentally transforms her fans in the crowd into animals. Giving her a bit of stage fright is all she can think about, but after Toralei Stripe makes a fool of herself, it helps Casta take her mind off things, allowing her to perform again.

Casta has long black hair with purple and orange highlights in her bangs, and her skin is green. Her outfit consists of a shimmering purple and orange dress with orange and black ruffles flowing from a black belt. She has purple boots, an arm warmer with a fishnet glove, and holds a purple broom with orange ribbons and a purple microphone.

Casta Fierce is a character introduced in 2014. She is a witch, specifically Circe's daughter, and the lead singer of The Spells. Besides Casta, The Spells consists of three girls who are exceptionally immune to Casta's magic. Like her mother, Casta can transform anyone into any animal, but she has limited control over her powers. A single misspoken word or phrase is enough to transform anyone who hears her into the corresponding animal. This has derailed her singing career, but Casta and her band continue making music while searching for solutions. Casta is close friends with Catty Noir.