A girl from Ai's school who took a picture of Hitomi while shooting photographs of the moon with a telelens. She later boasted to one of her friends that she had taken pictures of Cat's Eye, sending Ai (who overheard the conversation) panicking. Kasumi became determined to reveal Cat's Eye's true nature and planned to go to the place Cat's Eye's next target with her camera. She managed to get a good look at the backside of Cat's Eye and thought that Hitomi fits that picture very well, and became only more convinced when she sees Hitomi playing around with some punks in the park. Asatani has noticed this too and takes Kazumi into her confidence. With a story about her dad being away (that it is unsafe for a young girl to be alone at home), Kazumi infiltrates into the Kisugi's home and asks Ai to let her stay the night. However, the Kisugi sisters managed to cunningly circumvent Kazumi's suspicion by appearing that Hitomi was still at home during the Cat's Eye mission.

(Source: Wikipedia)