Gemma was born in 1978 into a German middle-upper class family. She was the first daughter of Gretel and Hans and Gemma was happy until 1987 where Chryssie was born. Gemma became very unhappy with the new arrival of her sister, as all the attention had gone to her. Gemma was so outraged that she destroyed her sister's room with her sister still in it, she decided to tell her parents a burgalar had done it, and only ten years later did Gemma tell Gretel, Hans and Chryssie it was her. With the amount of damage she had caused and the amount of money it had cost, at the age of 20 years old, Gemma was left in the house alone to keep responsible, and her family moved to Bridgeport into a small flat.
Gemma wears a white and black coat (simmilar to that of Cruella De Vil) over a long, blue, woolen dress and blue high heels. Since she was a girl did Gemma like to wear coats with complimentary colours. She may be slightly evil, but she still has style.