Usagi is a Japanese schoolgirl who resides in Azabu-Juuban, Minato Ward, Tokyo, Japan. She is first presented as a goofy, clumsy, and friendly teenage girl who tends to be a bit of a crybaby. It is also shown that she does not like schoolwork and as a result, she doesn't fare well in some of her classes. In addition to this, she is often seen as immature and is somewhat of a glutton, the latter trait being very notable in the first anime. As the series progresses, she starts to become less of a reluctant and impetuous heroine and grows into a more mature one instead.