Kiriko Miyamoto is the mother of Rei Miyamoto and a former police officer.
Kiriko Miyamoto as a teen was once the leader of a gang, but grew up to become a member of the police force of Tokonosu City in the mobile traffic division and practitioner of Sojutsu (spear martial arts). She married another police officer, Tadashi Miyamoto; and together they had a daughter named Rei Miyamoto. She left the force to be a mother but never lost her fighters will or her edge. When the outbreak of Them (the titme given to the zombies) swarmed the city, she held up at the home of some neighbors.
The character of Kiriko Miyamoto is a supporting character of the manga/anime series Highschool of the Dead that was written by Daisuke Sato and illustrated by Shouji Sato. The series first began serialization in Fujimi Shobo's Monthly Dragon Age magazine in July 2006. She doesn't appear until the final chapter of Volume 7.
Her first appearance was in Hightschool of the Dead Volume 7 CH. 29 "Dead in the Rain", and she has made no appearance in the anime series, to date. An obscured first look of Kiriko can be seen in Volume 7 CH. 28 in a photo that is on the desk of her husband.
While Kiriko Miyamoto was living with neighbors, close to her own home, to survive the outbreak, things were going well. She got along with everyone until they had let in some new stranger. After they sent her out to gather food alone, she returned and they refused to let her back in. As she was banging on the gate, Her own daughter, Rei, called out to her. After the joyful reunion, she told Rei and her friends about how she wound up in this situations. Takashi invites Kiriko to join they group as they move to the Shintoko Third Elementary School, where the J.S.D.F.(Japanese Self Defense Force) have been organizing the evacuations. She tried to tell the people inside about the evacuations, but they refused to believe her.
Having given up on the neighbors, Kiriko was now with Team Takashi. When Rei asked about her father, she could only tell her that she hadn't heard from him but was sure he was still alive. She had a spear as a weapon, but Kohta also gave her an automatic pistol he got at the police station. Now armed, the group moves along quietly so as not to draw the attention of Them that had been approaching before.
Kiriko's main weapon is a spear that is used in traditional spear martial arts and belongs to her husband. After she joined Team Takashi, Kohta Hirano gave her an automatic pistol that he aquired from the police station they had been at earlier.