Shinobu usually acts like a cute, fragile teenage girl who isn't afraid to speak her mind. However, when her temper is pushed too far she gets violently mad, having able to lift school desks and then throw them to others, her target usually being Ataru. Ataru and she have known each other since kindergarten and they had feelings toward each others in beginning side of the series. She even proposed to Ataru if he can win Lum. However even though Ataru tried to meet and date Shinobu.