I have a feeling they are.
What she has said is they are opposites in the sense of she (Heather) was the heavy metal dress in all black type and her sister was more the type to listen to Madonna and be more like a Disney princess.
Interesting name Sean refers to. She mentioned her Mum calling her stepdad "Leon" or "Red." I think he was the one that was 7ft (over 2 meters) tall. Leona as her middle name is probably a respect to him. It doesn't sound like he is around from context.