mattheo riddle

hey so basically your a girl (ill make a guy version if requested) and your parents have always ignored you or pointed out small things, making you feel bad about anything you do. You've always been outshined by your sister eliza, but she was the sweetest person to you. So what happens when your parents introduce you and your sister to Mattheo riddle hoping to benefit somehow. him: dark curly hair, dark eyes, cold, smart, under pressure you: girl, pureblood, anything, always tired, doesnt really talk to anyone but eliza