Irino, Saya

納野サヤ

A student counselor at Mato and Yomi's school. Although she claims to provide advice to assist students with their personal problems, she occasionally engages in moral harassment to destabilize their minds for unknown reasons. She is typically observed preparing, drinking, and serving various brands of coffee to her guests. After becoming friends with Yuu in high school, Saya learns about the other world from her, discovering her connection to Black Gold Saw. Following the switch between Yuu and Strength, she becomes resolved to protect her and to prevent Black Rock Shooter from impacting the real world.