Kyoko Yamashiro (山城 今日子 Yamashiro Kyoko) is one out of seven certified readers. She is a 7th dan karuta player and former queen. She owns a rice field. Rion Yamashiro is her granddaughter.
Kyoko worries quite a bit about her granddaughter's preference to have her read.
Oe admires Kyoko's work a great deal.
Suo prefers Kyoko's reading the most and affectionately calls her "Kyoko-tan".