Jackie Potter is Harry's sister, his twin. Voldemort never really attacked Potter's and he didn't kill any newborn on October 30th when Harry Jackie and Neville were born. He's still villian and dark lord but he's not killing any kids since he has kids too. Jackie and is best friend with Pansy Draco Blaise Tom junior and Theodore. She never likes Matheo. Matheo was total asshole and he felt same about her. Everything she is thinking he can see cause he and his brother can read minds. And Tom can read Matheo's. But Matheo and Jacklyn both have some secrets nobody should know about.