Cynthia Wilson and Mason Richter were two average muggles living in Melbourne. One worked in an office behind a desk, the other was a waiter at a upper-middle class restaurant with a desk job on the side. They met through a dating site and hit things off just fine. Quickly the two decided they may as well get married. This was when Cynthia was told of Mason's previous relationship, and the daughter he never saw--Morgan Grace. Shocked, and a bit annoyed, she said she was fine with that but the girl should never show up on their doorstep. Of course, she'd only been kidding but Mason hadn't seen that.
Within the year, Geraldine entered the world, and her parents couldn't have been much prouder. And though he loved and cherished his daughter, often hoisting her on his shoulders for walks to the park, he still wanted a son. Both his attempts with each wife had failed thus far. Within three years, little Gerry had a brother of her own--Jordan Landon Richter. The two often butted heads, and Geraldine often felt jealous at the attention [esp. the positive] that he got, and would cry until she received the same attention. Only as they aged did this calm, and did she learn to see him as anything other than competition.
Life at St. Andrews was hard. Geraldine was often teased and ridiculed for her large forehead and bushy eyebrows, causing her to often lash out violently against her classmates. A light came when she met a girl who comforted her and told her things would be fine. The two quickly became best friends, often playing at Gerry's home after school. Her parents never mentioned they were sisters.
After the school split the muggles from the magical children, Gerry began attending school in the Bilby wing at Tallygarunga as a member of the Platypup house, and was not only delighted that her best friend was also attending, but also that she'd made another friend--Lee Evans, who was many years younger than herself. She grew to care for him like an older sister almost immediately, and idolized his elder sister Leanna. Around this time, she'd snuck around the barrier and caught sight of her first quidditch game, immediately falling in love.
Time passed and she graduated from a Bilby to a full Tally student, whereupon she became fully immersed in her education. She quickly garnered favorite subjects--herbology, potions, and flying, and dreamed of the day she'd make her house team.
In her third year, she managed to somehow make her way onto her house's Quidditch team, to which she couldn't have been more excited. It gave her something to look forward to, as well as a healthier outlet for her varied emotions and aggression. She started making progress with her attitude and the fighting. Then, in her fourth year, she found out the truth about her best friend Morgan. This created a slight rift, drudging up feelings of confusion and anger--mostly at her parents, but she was never good at directing them, and so they spread to others around her. She withdrew for the remainder of the year. The friendship eventually repaired in the following year, but the damage was done.