Though Kasumi seems innocent and sweet, she's heavily determined to become a school idol, even going so far as to sneak bread into the shoes of her competitors--oops! That was a secret, wasn't it? Nevertheless, she hates to lose, and hates her nickname of KasuKasu--given by Karin--as she believes that it weakens her more than she'd like to admit. Nevertheless, she's highly loving of the world of idols, and very full of her talents.