At least some content in this article is derived from information featured in Harry Potter: Hogwarts Mystery. Spoilers will be present within the article.
Penny had long, blonde hair, which she tied up in braids (with the back of her hair not tied into the braids, as well as her bangs tied up in braids). Penny also had bright blue eyes and light skin.
She was often seen wearing her Hufflepuff robes, as Hufflepuff was the house she was sorted in.
Penny was sociable and approachable, regarded as the most popular girl in her year while attending Hogwarts. As a result of her social standing and vast network of friends, she was also very well-informed about the happenings at Hogwarts.
Penny lived in London with her younger sister, Beatrice, and her parents. During the summer, Penny would go on vacations with her family to the country. On one of these vacations, a muggle friend of Penny's, Scarlet, accompanied them. Scarlet and Penny went wandering through the woods during a full moon when they discovered a werewolf. Rather than being frightened by the creature, Scarlet was intrigued and wanted to follow it. Penny however had been paralyzed by the sight of it and by the time she came to and wielded her wand, Scarlet was killed by the werewolf before Penny had time to react. Feeling responsible for the death of her friend, werewolves had become the object of Penny's greatest fear, troubling her to the extent she brewed a Forgetfulness Potion to rid herself of the memory.
Penny was also friends with Jacob's sibling.
- Potion-Making: Penny was a skilled Potion-Maker, considered one of the most proficient in her year.