Physical Description: Thea is 137 centimetres tall, a little smaller than the average 11-year-old. She has light brown long hair, which she likes to wear loose, and grey blue eyes. She is slim and with her small size, this makes her agile and nimble.

Thea wears comfortable clothes when she doesn't have to wear her school outfit. Usually jeans and T-shirts or sweatshirts with different patterns such as dots or stripes.

Her facial features are delicate, and her nose is slightly wider, which she doesn't like about herself. (But she would never admit it). She likes to laugh a lot and has small dimples on both cheeks. She also has freckles around her nose, which are more visible in summer.

Mental Description: Thea can best be described with the ENFJ personality.

She is extroverted and likes to approach other people. She therefore has no problem with large crowds and usually finds it easy to start a conversation.

Thea is also a very imaginative, creative child and very curious. If she has the feeling that someone has a secret, she is keen to find out. She sometimes finds it difficult to respect boundaries. This is because Thea is often an open book for other people. She has no problem having a different opinion and expressing it. Even when others try to convince her that she is wrong, she stubbornly sticks to her opinion. Even when she is wrong, Thea is reluctant to admit mistakes and finds it difficult to apologise when she feels she is right.

In her circle of friends, Thea is often a loyal and empathetic friend and can tone down her extroverted nature. However, if she experiences injustice, she stands up for her friends whether they like it or not. She has a strong sense of morality and right and wrong. Due to her age, she usually thinks in extremes and often sees the world in black or white. This means that someone who does something bad to her is the bad guy for her, and she doesn't question why someone is acting this way. She still has to learn that there are often moral dilemmas, not just one solution to problems, and to find out why someone acts the way they do.

Biography: Thea was born on 4 May 2013 as the only daughter of the wizard Charles Belville and the Muggle woman Dorothy Bellville near Weymouth.

Her parents met on a hike. (It would later turn out that Charles had an accident with his broom and literally crash-landed on the mountain Dorothy was climbing with friends). Naturally, Dorothy was surprised at the news that her husband was a wizard after their wedding, but she took the news surprisingly calmly. Her parents are still happily married and her mother knew before she was born that it was possible that her daughter could become a witch. As a result, it was not a big issue at home and Thea took levitating household appliances for granted, as well as knowing and categorising classic fairy tales and terms from the magical world.

To prevent Thea from talking about magic at school and giving away her father's secret, Thea was taught at home. Despite everything, she made friends because her parents had a large group of friends who were magical couples with children. Before attending Hogwarts, Thea had many friends who visited her regularly and with whom she could play hide and seek or wizard's chess.

First Instance of Magic: Although her parents were aware of the possibility that Thea, like her mother, might not be magically inclined, her mother and father hoped she was a witch. They were therefore always on the lookout for small signs, but they didn't appear until she was almost eight years old. Thea's first spell consisted of blowing up a chocolate cake before going to bed after a tantrum because she was denied a piece of it. (She was denied the piece because her mum had prepared the cake for her birthday the next day. That's a piece of information she likes to withhold when telling the story.)