Kakeru's childhood-friend and classmate, whose charm point is her "antenna" hair which changes form according to her mood. She's an heiress to the Tenkuuji group of companies and she holds a romantic feeling toward Kakeru. She's gentle and easy-going, but her weird sense of imagination tend to warp her into her own world. She has the history of being saved by Kakeru from being kidnapped. She also has the tendency to become a Kuribo look-alike (from the Super Mario series) when struck by jealousy; she starts kicking Kakeru's calf.

Empty Can!
Hobbies are often a great way of meeting new people, but how could Kakeru Diachi, who collects rare juice cans, have ever suspected that he'd meet a fascinating new girl when he attempted to DRINK her? Naming her Melon, because she's got great melon... soda, Kakeru quickly learns that she's an Akikan—a beautiful girl who's also a special can created to fight other Akikans in a strange experiment to determine what kind of container is better: steel or aluminum! Will becoming involved in this ridiculously twisted research project gone amuck complicate Kakeru's life incredibly? Of course it will, but because Melon's steel body needs carbon dioxide to breathe, he's now stuck with her since she's too CO2 dependent! And when his wealthy, attractive, best childhood friend Najimi gets HER own aluminum Akikan, the trouble really begins!