Reiko is a pale-skinned young woman of average height. She has chin-length, pale gray hair parted on her right, which obscures the majority of the left side of her face. 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.