Aya Kureha is a maid who works at the Twilight Mansion. Her older brother Fuyutoki works at the main residence of the Giou Clan. She first appears in story eight.
She prefers to dress traditionally and is only seen once in something other than a kimono, in story 38 as she wore a maid outfit which was a gift from Ria.
She originally referred to Yuki as "Yuki-sama," as most of the characters do, past the main characters who are closer to him, though when Yuki expressed discomfort with that title, she hesitantly changed it to "Yuki-san."