Sayoko Shiki (志(し)岐(き) 小(さ)夜(よ)子(こ), Shiki Sayoko) is the Operator of Nasu Squad.Shiki is a Hikikomori. In the past she lived on the scant provisions sent to her by her family, but after joining Border she began to shop online by herself.
志岐小夜子，日本漫画《境界触发者》及其衍生作品中的女性角色，边境本部B级作战小队成员，隶属于全女性组成的那须队。作为操作员，她具备触力能等级7的作战能力，其特殊副作用是遮蔽左眼时可延伸视野观察障碍物后方景象。