Bella is an 11-year-old student starting her first year at Hogwarts. She was born and raised in London by her parents, Vivienne and Malcolm Jensen. She has no siblings, but the family does have an old dog named Thelonious. Her family is wealthy and pure-blood, but has chosen to live in the Muggle world because of their interests. Before Hogwarts, Bella went to a Muggle school.

Her childhood home is a townhouse in Mayfair, London. She didn't have many friends growing up, and though she is used to her parents using magic around her, she is new to the wizarding world - though she has heard many tales about when her parents attended Hogwarts.

Her first accidental magic was when she had just turned 11, and she was at school. She accidentally set off all the sprinklers all over the school; thankfully, no one could prove it was her. She was emotionally triggered by a maths question she didn't know the answer to, and it just happened. Her parents just laughed it off, since they knew how awkward the first magic experience can be for a young witch or wizard.

Bella is 140cm, petite, and blonde. Her hair is long and a bit wavy. She has blue eyes and freckles. She cares more about comfort than fashion, and she likes her new robes.

When Bella first meets someone, she is shy and a bit quiet, but once she gets to know someone, she talks all the time. She values a few very trusting friends rather than large friend groups.