Yamiro Shirogame

Yamiro is one of the 6 rivals and is a male student who attends Sara's school. Yamiro gets killed by Sara while she is hallucinating about stabbing her rival Akari, and accidentally ends up hurting Yamiro instead in the introduction cutscene.

In Act 3, Spoiler, he appears in Sara’s dreams to haunt her. At the start of the day he will appear in the locker area, lying dead on the ground, after some dialogue, he will be standing up and then get stabbed by Sara again, then he would chase her for the rest of the act.