I was getting awkward vibes from Nao when they were starting way back. She was the youngest then. When Yuri left the group, she slowly assumed 'hype girl' position, and we didn't see then the now supremely confident Nao, not just yet. I'm not sure she has been really designated as the leader of the group, but of course we do see her as the de facto spokesperson.

I won a signed poster before. I showed her a photo of it, and asked if she was the one who signed my name. I don't speak Japanese, she nodded in affirmation when I asked, though there's no telling if there was complete understanding in our conversation, so let's say, yes, she signed my name on that poster lol