Kyoko displays shyness and becomes easily embarrassed when praised. Her physical characteristics include blonde hair typically pulled back in a short ponytail, green eyes, and a habit of chewing on a stick or lollipop. She works as a hairdresser.

She maintains a close friendship with Hana Takayashiki, her former middle school classmate. Kyoko occasionally spends time with Hana's younger sister Aya and Aya's friends, joining them for activities like board games at Aya's house. During these encounters, Miki feels a sense of familiarity but cannot immediately recall their past connection. Kyoko continues her protective tendencies, choosing to spend time with Miki when finding her without activities. Her name "Kyoko" combines "capital city" (京) and "child" (子), while "Maki" means "shepherd, tend cattle."