Niomi was born on October 30, 2074 in Norwich, England to her father James Alexander Kelly and mother Christine Kathren Daphne Kelly (nee Summit). The Kelly family, who later consist of her two younger sisters Sophie and Tahlia, are pure bloods. They consider pureblood to continue to run in the family for future generations. Although they expect the magic pure blood line to continue, they have absolutely NO haltered towards non-pureblood folks and muggles. In fact, they love muggles, muggle-borns and half blood people. Also, the Kelly family aims to have more than two children. Even though the family expects pureblood marriages into the family they will not disown or harm their family for marrying outside of pureblood linage. This wasn't always the case in the past generations.

During Niomi's childhood, she loved creatures and people. She spent a great deal learning about animals and humans. Even with pureblood blood, muggles have always interested her. For as long as she could remember Niomi knew what Hogwarts School of Witchcraft and Wizardry was. As she got older Niomi looked forwards to attending said school. At the age of 5, when she started to show signs of magic, her parents were thrilled. Long before her 11th birthday, Niomi's parents told her all the wonderful things Hogwarts had to offer her. For years she would imagine what Hogwarts looks like and was it would be like.

On October 30, 2085, an owl arrived at the Kelly home with a letter for the oldest child of the three sisters. With excitement, Niomi was spent the rest of the year preparing herself for her new school. There was one thing that worried her most, what house would she be placed into? With her pureblood family, they were all placed into different houses. Niomi's grandmother was a Hufflepuff and her husband was a Gryffindor. Niomi's aunt Victoria was a Slytherin and James and Christine were Ravenclaws. Christine would comfort Niomi when she would think her parents would be disappointed that she wasn't placed into Ravenclaw. Truth was, James and Christine did not care at all what house Niomi would belong to.

Finally the day has come, Niomi arrived at Hogwarts. She was more nervous than ever when she waited to get called up to the sorting hat. After a short while Niomi heard her name be called. She instantly held her breath. Forcing herself to move, she found herself sitting on the stool and talking sorting hat being placed onto her head. As the hat was deciding what house she will belong to, Niomi was expecting to hear the word Hufflepuff, but that did not happen. When the sorting hat shouted Slytherin her eyes grew big. Slytherin?! That was the last house she expected to be placed into. Without knowing she showed the personality traits of a Slytherin, which would grow in the years to come.