Sumire Yoshizawa is a cheerful, elegant and friendly person with a seemingly perfect life, as she received a Shujin scholarship and was (supposedly) nearly uncontested in gymnastic competitions. She also appears to be quite clumsy and careless. Despite her supposedly cheerful and bold personality, she sometimes experiences bouts of depression for no apparent reason; usually if the protagonist meets with her, she will end up with a gloomy mood for the slightest of mistakes.