The light to his dark world

What if Harry had, had a sister? He'd have a little bit of hope. Except with the children being almost exactly a year apart the sister knew they were wizards. When their parents get killed by he who shall not be named Farrah Snow Potter protected her baby brother with all her being, however as a they were both tiny infants that would be a lot of hard work for her. When they were supposed to be dead they lived. They got sent to these horrible abusive parents mother's mother's sister and her family, who hated them because they feared them they knew they were wizards. Even when everything was so bad it could've still been worse they wouldn't have each other. They were as close as two people could be, and no matter what they couldn't be happier no matter how bad things got for them.