Yukiyo Misaki (三崎 幸代, Misaki Yukiyo), better known by her pseudonym Kirika (キリカ), is Mei Misaki's aunt and the owner of the doll store, Misaki M. Studio. She is also the person who makes the dolls upstairs while the store itself is downstairs.

Before the start of the series, Kirika was born with her twin sister, Mistuyo. They both married, and her older twin sister was soon pregnant with twins. These twins are revealed to be Mei and Misaki. Kirika also got pregnant, but she miscarried, leaving her devastated to the point of going crazy, even more so when she learned that the miscarriage rendered her infertile. At that time, the Fujioka family was experiencing financial difficulties that made them uncertain about their ability to raise two children at the same time. Because of this and the fact that Kirika was still trying to cope with losing her own daughter, Mei, her older twin niece, was given to her. Mei says that Kirika might have wanted to keep this a secret forever, but her grandmother accidentally let it slip.

Kirika is a young woman with long, dark brown hair, which is placed in a blue ribbon at the back of her head. She has brown eyes and wears a white and blue shirt with a band, with a green shirt underneath. She wears black, three-quarter pants with orange shoes. In the manga, she has black hair and black eyes, but the same physical appearance. The only difference is that her eyes in the manga are sad, hollow, droopy, and look like the eyes of a sick woman, making her look older.

In the film, Yukiyo's appearance is the same as she had in the manga, but she has short hair and looks a little bit younger.

According to Mei, Kirika doesn't really care about her or what she does, is indifferent towards her school life, and apparently treats her like one of her dolls. She's described as a "strange woman who isolates herself in the studio upstairs." Mei believes that Yukiyo, along with Kotaro, initially cherished her more than most people would have, and that they did everything she could for Mei when she lost her left eye to disease, with Yukiyo giving Mei a prosthetic eye to replace it. Mei was grateful for everything Yukiyo did for her early on, but Yukiyo at some point started to project her unborn child in Mei, which led to Mei feeling like she was treated as nothing more than a replacement. It is believed that Yukiyo shuts herself in her workshop and creates all of her dolls because of the heartbreak she has for her unborn child. Mei also said that when she asked Kirika if she could see her real mother, she was very upset and angry. Yukiyo didn't allow Mei to see her real mother and sister, but Mei and Misaki, her twin sister, were meeting in secret. She bought Mei a mobile to be sure she doesn't go to see Mitsuyo. In the OVA, Mei said that Yukiyo feels guilty for taking away her twin sister's baby girl. She fears Mei might run away to live with Mitsuyo; because of that, she doesn't allow Mei to see Misaki. She is somewhat friendly with Kōichi and is intrigued that any boy, let alone him, has an interest in dolls, and permits him to stop by anytime.

In the OVA, Yukiyo went to a doll exhibition in Tokyo. She is only mentioned by Mei once before she was actually seen. She is only seen briefly, though, watching Kōichi Sakakibara as he was about to enter the store before she retreated to her studio upstairs. She also appears when Kōichi and Mei were talking and just says a few things before going back to what she was doing, in Episode 4. According to Mei, Kirika made Mei's glass eye for her after she lost her real eye, saying that "an eye with the same color as her eye will be boring", so she made it green. At the end of Episode 12, after Mei tells Kōichi she threw her phone in the river, she claimed that "she (Yukiyo) will buy another phone soon for sure".

Main article: Yukiyo Misaki/Image Gallery