Reiko is a quiet and emotionless teenager who often shows an odd body posture, wherein she keeps her elbows to her side and lets her hands dangle, which somewhat resembles ancient depictions of zombies, ghosts, and other undead creatures, alluding to her Quirk.

Befitting her Quirk and appearance, Reiko is shown to be a fan of horror and enjoys reading scary stories online. Despite this though, she can come off as rather timid at times, as she seemed intimidated by Neito Monoma's ranting towards