Chiyo is a young girl who recently arrived at Astraea Hill, where she quickly became the "room temp" for Nagisa and Tamao, which incidentally is exactly what she wanted. Chiyo tends to be a very shy girl who is unable to articulate herself forcefully enough most of the time and is also rather a klutz. Additionally, she too seems to have a crush on Nagisa, which can also be construed as a form of admiration and idolism on her part. Also, she is a member of the Library Club and works as a librarian in Astraea's Library.

(Source: Wikipedia)