Haneoka Eimi is Haneoka Meimi's mother. When Eimi was younger, she was a kaitou also, but then she met Haneoka Gen'ichirou- a magician- she stopped and married him. Like Asuka Daiki goes after St. Tail, Detective Asuka went after Eimi.
Haneoka Gen'ichirou is Haneoka Meimi's father. He is a magician and he lets Meimi 'borrow' his tricks for her purposes. Somehow, it doesn't bother either parent that their daughter is a night thief using magic to help others, but it must be in the blood.