She has a chaotic personality, often doing things randomly and for no apparent purpose. She can be quite rude and obnoxious, as seen in the first thing she said to Shiki (threatening to kick him etc). She's rather uncultured, especially compared to Tohko, her sister. No-one really knows why her grandfather suddenly chose to switch the heir to Aoko rather than Tohko. She's an average magus, except in the field of destruction, in which she reigns supreme. Her family has the element wind. She likes beef, I would assume, being joint champion (with her sister) at a grilled beef restaurant in a neighbouring town. She seems to have a strong sense of right and wrong, as she demonstrates in Tsukihime, but her actions in Melty Blood show the chaotic side to her nature.