Alexia Amelia Potter is Harry Potter's younger twin sister. She looks exactly like her father, apart from her mother's feminine features and brightness. But, very few knew about her, that too only her friends. Not until, she gets attracted to a man forbidden for her good.
Katherine Potter is the twin of the boy who lived. No one knows about her, and the power she holds,and she doesn't realize that she is destined for none other than a misunderstood racist pureblooded Slytherin blonde.
"I lay my eyes on the girl, who so made the atmosphere around herself so happy, even in such gloomy times. I couldn't help but smile as I stared like an idiot at her. I didn't even care, that she is the twin of my arch rival, Harry Potter. I didn't care that she is Katherine Potter, a girl born to make you wish for her."
- Draco Malfoy