Reiko has chin-length, pale gray hair, parted to the left, hanging down over her eye and obscuring the majority of the left side of her face. She has dark bags under her blue eyes, and a small mouth with full lips. Her hands are usually held up as high as her elbows, with her hands draped down, this gesture being somewhat connotative of a ghost.
Her hero costume consists of a pale purple, knee-length kimono with a white, furred collar, three dark straps around her waist, black knee-high socks, and a black mask that covers her face from the bridge of her nose down, somewhat like the one always worn by Mezo Shoji.
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.
She also appears to be quite verbose with her wording, to the point where Reiko's classmates need to simplify what she says.
Poltergeist (ポルターガイスト,Porutāgaisuto?): Reiko's Quirk allows her to telekinetically control nearby objects. The weight limit of her Quirk is roughly the weight of the average human.
Fixation of Hands
Reiko's stats, according to the Ultra Analysis Book
Reiko's surname contains the kanji for "willow" (柳,yanagi?), and her first name contains the katakana symbols for the rōmaji word "rei" (レイ,"rei"?), which probably stands for "spirit, soul" (霊,rei?), and the kanji for "child" (子,ko?).
Reiko likes the internet (always searching for spooky stories).
Reiko's hero name "Emily" may be a reference to the American horror/drama film The Exorcism of Emily Rose, which explores the mysterious and possibly paranormal circumstances surrounding the titular character's death.
Reiko's Japanese voice actor, Ayane Sakura, also voices Ochaco Uraraka.
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