Annabelle is the daughter of Sirius Black, being the daughter of a mischievous marauder there was no doubt she'd get in trouble. When Snape put Annabelle in detention in her third year after she pranked the Slytherins, Annabelle met the Weasley twins, they became partners in crime and Annabelle eventually fell for one of the twins.
Credits go to J.K Rowling for the creation of the Harry Potter series and the characters
(Yes I know the name is weird.)
(Also on Quotev)