|First Appearance||Episode 2|
|Voice Actor||Kotono Mitsuishi|
Harumi suffers from dissociative identity disorder, and her alter is a sex worker named Maria.
Harumi has short, brown hair that's slightly curved. Her glasses are white with pink lenses, while her usual outfit is a green dress. She also wears blue earrings and a necklace. Unlike Maria, she doesn't wear makeup.
She is typically quiet and reserved, but at night she becomes her alter ego. Harumi fears letting others know about Maria, as evident with her husband and her interrogation with the police. She is also shown to be great with kids due to her day job as a tutor. Harumi even comes to Yuichi's birthday party, making her the only guest besides his mother.