During the reign of William III & Mary II in 1692 the International Statute of Wizarding Secrecy was signed, separating the lives of the magical and the muggles. The reign of the muggle royal family over the magical population of Britain - and later the United Kindgom - was largely undisturbed; both British societies observed the same monarch until the pure-blooded of the magical society began demanding detachment. From what started as being general discontent grew into violent actions with a magical civil war approaching over the horizon. In a stroke of luck that avoided turmoil, the ruling King George III had a magical daughter hidden from the muggle society. This daughter, Princess Charlotte, was quickly installed as the monarch of the magical society of Britain - an act which finally separated the two.
The arrangement worked out perfectly for both societies; whilst both monarchies were separate, the two worked closely to ensure similar values were shared and upheld. When the muggle monarchy changed their house name to Windsor, the magical monarchy followed suit. Everything was harmonious until the ascension of King Henry II. A monarch who wanted to devolve the power of the Ministry itself, Henry became tyrannous early on in his reign. Turmoil that threatened to overthrow the monarchy rose again, saved only by the forced abdication of Henry and the replacement by his eldest daughter, Victoria.
Proving to be the saving grace of House Windsor, Queen Victoria remedied her father's mistakes. She appealed to all crowds of magical life; advocating for no discrimination for species, being proud enough of her pure-blooded heritage to satisfy those who cared whilst remaining completely relatable for all. Her reign, still going strong, has remained among the most harmonious and popular since the magical monarchy's establishment.
Vivianne was the third born child of Queen Victoria, and the most rebellious one at that. She proved to be even at the young age of eleven, refusing to go to Hogwarts and instead attending Beauxbatons. Her rebellious side stuck with her through her years in school and after graduating as well, tending to always be found partying or some other outgoing sort of thing. She had quite the amount of scandels. When it came to people's views on her, it was either you loved Vivianne or hated her. Not much of an in between.
Henry was a news reporter who often would run into Vivianne coincidentally, having small conversations and such each time they came face to face. It had been Vivianne who finally asked him out, in which a romance would blossom from it and they would eventually marry. The reporter was, in fact, part of a pure-blood family with good lineage, so he was very much welcomed into the family. They would go on to have five kids coming in the order of Octavius, Sophia, Estelle, Alisa, and finally Princess Juliet Gwendolyn Antoinette Evangeline Diana of Windsor.
Even at a young age, Juliet has always been more on the mischievous side. And sometimes annoying. She loved keeping the nannies on their toes. She was either right in your face when you least wanted it, or no where to be found and causing everyone to frantically zoom around the large palace for her. She always was looking up to her older siblings, though, and genuinely would behave when they told her to. She genuinely did love the four, even though it could be hard to build a relationship with them. Octavius and Sophia were both were much older than the youngest princess, and although Juliet and Sophia were fairly similar, her older sister was gone by around the age Juliet was seven. Though, she did make sure to find a way to send her sister letters when ever she could and so at least there was that. Estelle was fine, and Alisa has always been... strange. Though, she still loved them all and looked up to them each in some sort of way. Not so much Alisa, but still.
The young royal's first magical incident occurred at the average age of eight, helping in her little need of attention. She was hiding from her nanny, but the woman was smart and knew Juliet enough that she was close to finding her. She would of if Juliet's magic hadn't casted a disillusionist charm or such on her, scaring the poor nanny sick. Juliet was gone for more than an a hour before finally reappearing and getting quite the scolding. This would lead to Juliet getting her Hogwarts letter when she was ten and ultimately attending the school like her siblings did.
At first, Juliet had wanted to go to school in Beauxbatons similar to her mother, but ultimately Hogwarts was the best fit. She wanted to be close to her family anyway. So Hogwarts is where she went and where she was sorted into the respectful house of Hufflepuff. At first, it was difficult for the princess to fit in with the school and deal with the big change... but was quick to deal and learn to love the place. Though, she's still quite the mischief maker and can often be found be scolded at by a teacher for one reason or another.