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Sejima Saito

世島 犀人

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Sejima Saito世島 犀人
AliasesOriginal Cyclops Serial Killer, New Cyclops Killer, Bloody Polar Bear, Shoko Nadami, Renju Okiura, Iris Sagan, So Sejima, Boss, #89
MeasurementsHeight: 184cm
Birthday1 March
EyesGreen, Sanpaku Eyes
BodyPale, Young-adult
ClothesBlazer, Gloves, Trench Coat, Turtleneck Shirt, Turtleneck Sweater
PersonalityCold-hearted, Cruel, Smart
RoleHalf-brother, Half-orphan, Sadist, Serial Killer, Son
Engages inAttempted Murder, Body Swap, Fighting, Kidnapping, Murder, Parricide, Self-harm, Sororicide
Subject ofAccident, Death, Disability, Eye Removal, Hospitalization, Injury, Mental Affliction
Voiced byAllegra Clark (English (Boss's body))
D. C. Douglas (English (uncredited, Hayato's body))
Greg Chun (English (original body))
Jackie Lastra (English (Iris's body))
John DeMita (English (So's body))
Kaida Yuuko (Japanese (Boss's body))
Kusumi Naomi (Japanese (So's body))
Shingaki Tarusuke (Japanese (original body), (uncredited, Hayato's body))
Shiraki Nao (Japanese (Iris's body))


Saito is the son of So Sejima. His mother died giving birth to him. Born with a brain dysfunction that left him unable to properly secrete oxytocin, he can only feel pleasure from murder.

At 24 years old, he served as the murderous half of the Original Cyclops Serial Killer, and at 30 years old he is labeled as the New Cyclops Killer. He uses the Prototype Psync Machine to swap bodies with his victims before killing them.