She's the same age as Dominique and Molly (who in my headcanon are the same age as Albus, Scorpius, and Rose idc what JKR says their ages are)
She's Dominique's girlfriend
Her full name is Brooklyn but she goes by Brook
She lives in the village near shell cottage
She met Dominique and Molly at the beach in the summer before Dominique 6th year
They ended up talking and hanging out (at first Dominique and Molly figured they probably wouldn't see her again because she's a muggle). Then when Dominique and Molly were going to head back home she asked for Dominique's number and if she'd like to go out some time
Dominique said yes because she really liked hanging out with Brook and she didn't realize that she'd just agreed to go on a date with a muggle until her and Molly were on their way back to shell cottage (it's not that she has a problem with muggles it's just sometimes hard to have a relationship with a muggle since she had to keep magic a secret)
Molly said it would be fine, but Victoire advised her against it. She ignored her sister
Brook and Dominique ended up getting together and managed to make the long distance relationship work
The next summer Dominique decided she wanted to tell Brook the truth since had been together a year and she didn't want to take the relationship farther without telling her
When Brook found out she thought it was awesome
Dominique taught Brook how to fly since you don't need magic to use a broom and Brook turned out to be an amazing flyer
Brook is really smart, but in more of a street smarts way then a book smarts way
If she went to Hogwarts she would totally be a Slytherin
Brook play soccer and is really good
When Dominique taught Brook to fly, Brook taught Dominique to play Soccer
Her uncle is the prime minister (which means he knows about magic) and one time he's in town when Brook is hanging out with the Weasleys. He goes to the beach to come give her a ride home and sees Hermione (who as the minister of magic has met him) and he's like wait a second what the heck is going one
And that's how Brook's family finds out Brook is dating a witch
Brook ends up becoming a professional soccer player
