She always mistreated Ryuuji, even when she didn't have feelings for him. She actually got some development, and is worth more then having a silly little archetype so carelessly thrown around these days being slapped on her. Every female who even frowns these days seems to be labeled as one. I dislike dubbing any character as a tsundere, because, as I mentioned, it's incredibly lazy characterization.
What? Moe is like, whoever you personally think is moe.
These are all silly, silly phrases anyway.