A math and science genius since young, she is known as the "clockwork Thumbelina". However, she isn't good with reading people's feelings and emotions, thus failing her humanities and not recognizing that she is in love with Nariyuki. From the time she was young she was never satisfied with a vague answer, which she finds humans emotion to be incomprehensible as compared to mathematics or science, and is oblivious to her surroundings once she's focused on something.She is also very timid.She is a very serious girl, always wants to understand human behaviors, especially love issues, by scientific methods. She is extremely determined, and sometimes stubborn, to attain psychology in university, although the reasons had been changed in later chapters.