Haruko

Appears in High Heels and Sneakers. She and her sister also appear in the Nickelodeon Reds front cover. One half of a conjoined twin. She and her sister share a pancreas and a liver. They work parttime 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.