Angel is Kaida and Belladona's Half Sister. Despite Belladona being her mother's "Precious Princess" who she would murder all competition for in order to invest in her daughter's future to succeed her, and is currently unaware of her daughter moonlighting behind her back as the vigilante "Cinderella" against her, Bellinora decided to take a gamble for one more daughter with a different mate, and struck the Jackpot so to speak.

Kaida and Belladona were both the offspring of Bellinora and an Alolan Marrowak named Dr. Crane de Samedi after a brief one night stand before ditching him.

Angel is the Offspring of a Charizard Demigod named Seraph Azoth, one of the sons of the The Forbidden King, the Usurper of Legendaries. Meaning any child born from this lineage would have unrivaled magical potential! Not only does Angel have the potential to be a magical prodigy but she is also Shiny.

Bellinora so far has kept Angel secret from Belladona. If Belladona were anywhere as ruthless and cruel as her mother she would see Angel as a threat, and she should feel threatened at least because with Angel in the picture, Belladona is suddenly a lot less valuable to her mother, meaning she could eventually become her mother's next target.

Angel herself is just a child and is entirely unaware of her mother's evil machination, or the existance of her half sisters.