Natsuko

Appears in "High Heels and Sneakers." She and her sister also appear in the Nickelodeon Red's front cover.

One half of a conjoined twin. She and her sister share a pancreas and a liver. They work part-time at the university where Sugawara studies twins. Because of a sudden growth spurt, she was forced to wear sneakers while her sister wears her high heels in order to balance out.

She acts as the big sister and is shown to be the more reasonable twin.