Katherine Riddle. Her and her brother mattheo are children to Tom riddle aka voldemort and katerina petriova. Katherine gets her looks from her mother Katherine but her personality from her father voldemort, she always wanted to make him happy even thought he’s is azkaban. her brother Mattheo may look like Tom but he hates being associated with his father he gets his personality from his mother. Now Katerina petriova wasn’t a good person either she was a death eater almost as bad as Tom.