small body of water or a small stream?

neither, Brook(e) while it does mean small body of water or small stream

In this case it is the new name of a main character of a story i cant remember the name or the author of, and most importantly much plot

MC changes school, to boarding school, can't remember if this is because change from middle to high school

can't remember if Brook is MC's name and mistake in gender is assumed as someone spelled Brook with an e

think other siblings are at the school, all sisters, think they all have same father but "Brooke" has different mother

this is all i can remember

Also, I am pretty sure father isn't an absentee, but more of a rich workaholic