Bridget Wenlock

Origin: Harry Potter
Hair:
Eyes:
Species: Human
Birthday:
Residence: Weiss Street 50 (9-43)
Occupation: Scientist (Arithmancer)
Affiliation:
Talent: Magic
Medical notes:
Sports/Instruments:
Languages:
Import Date: 5(+)
Pets:

It was one day, during breakfast, that Wenlock wrote the immensely famous theorem that supported the magical properties of the number seven. She wrote it down on what she thought was the back of an envelope, in the usual Invisible Ink. That same day, she posted a letter to her cousin, using what she later realised was the envelope in which she had written the theorem. Wenlock seized her broom at once, and managed to overtake the owl carrying the letter mid-flight but the owl refused to give anyone the letter but its addressee. After several nips and scratches, Wenlock had to resort to simply following the owl to her cousin's house in John O'Groats, around 600 miles away.[1]
When she finally retrieved the envelope from her cousin, a Revealing Charm revealed that it contained no more than a cake recipe. It was only when she returned to Tinworth that Wenlock found out that her calculations were scrawled on a sugar packet that was still sitting on her kitchen table.[1] It was precisely this theorem that made her such a celebrated Arithmancer for centuries to come.
At some point, Bridget presumably had children, as she had a relative by the name of Daphne Wenlock who, as of 2020, was working at an Inn at number seven, Aldwych Road in Tinworth.[4]

Death and post-mortem
Ms Wenlock died in 1285, aged around 83. In her honour, her Arithmancy achievement was recorded on a Chocolate Frog Card.[6]
There was also a portrait of her hung on the Sixth-floor corridor of Hogwarts Castle, hiding a secret passage to the Portrait Room (the password was Snafflejack).[7] There was also a bust of her on the Fat Lady's Corridor, on the seventh floor of the Castle.[8]
During his third year at Hogwarts School, sometime between 1987 and 1990, Gabriel Truman got into a big trouble for duelling a Ravenclaw Prefect, who insisted that Bridget Wenlock had come from his house. Instead of a week of detentions, Professor Sprout let him off with a warning and a box of coconut ice.[5]

Magical abilities and skills
Arithmancy: Wenlock was a highly accomplished and celebrated Arithmancer, who notably discovered the magical properties of the number seven. She devised many impressive numerical calculations throughout her career and was highly protective of her theorems that she had created.[3] Her knowledge and experience in this field of magic warranted her inclusion on her own Chocolate Frog Card.[6]
Charms: Wenlock was also talented with charm-work, as she was capable of casting the Revealing Charm, which she used to reveal the contents of many of her own personal mathematical notes and papers written in Invisible Ink.[1]