So, that's how it would look like to outsiders. She didn't think that many people paid attention to her relationship with Akito, anyway. So, up until recently. Setsura didn't care about other people's opinions. But, once she realized it affects Akito too. Setsura slowly changed her mind. These days she is far too reckless and attracts too much attention. How many times does Akito have to clean up her mess? She isn't a child. However, she is grateful.
Akito is one of the few people who accepted the weak side — accepted everything about her, no matter how ugly it is. Back then, no matter what she did. No matter how much effort she put in. It was always her fault. Everything she said was an excuse. She was never right; she was always wrong. Before she knew it, Setsura found herself gradually affected by those words. She understood it was their opinion, that's just how things are.