Haruko

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. She hates wearing high heels but is forced to wear them to be able to balance out.

It is later revealed that she finds the job boring but still goes to the university because she likes Sugawara.