Additional Info from Wikipedia:
Cool and serious, Chihaya has the greatest enthusiasm towards music (and according to the game, the greatest natural talent for it as well) out of all of the girls, earnestly believing that if she were no longer able to sing, she would rather die. She doesn't very much care for the title "idol" in fact, and prefers to refer to herself as a "vocalist" instead, somewhat shunning the non-singing parts of being an idol. During her time off, Chihaya enjoys listening to classical music, along with generally spending time by herself, giving an aura of maturity about her. Though in actuality, she's really just awkward when it comes to communicating with other people. Despite her age, she has the smallest bust out of all of the characters, which makes her the subject of many jokes in fan material.
Hmm...Not much to say about her, but I am impressed with her desire to reach her goal. DXXD