Itsuki

Migi

Migi is the Parasite which lives in Shinichi's hand. Unlike "successful" Parasites, Migi has no desire to kill humans for sustenance, and is nourished by the food Shinichi eats. Mi

Shinichi Izumi

Shinichi is a thoughtful, compassionate high-school boy whose hand is infected with a Parasite. Shinichi is repeatedly put into difficult positions. He must find a way to peacefull

Kabuto

Serial killer that can sense parasites.

Akirumo

Police officer running the parasites investigations. Is under orders of Chief Urashima Kanzaki.

Mitsuyo

Old Lady that helps Izumi Shinichi at the end of the story.

Hideo Shimada

Hideo is a Parasite with a teenager's body who decides to integrate with human society. Hideo enrolls in Shinichi's high school and expresses a desire to become friends with Shinic

Nakai

Secretary of Mayor Hirokawa Takeshi.

Okura

Police officer that work at Fuusan Police Station

Makiko Hayase

Student of Sakurazaki Middle School. Meet Shinichi on a boat and asks for his help.

Ryouko Tamiya

Shinichi's substitute math teacher. She is infected with a parasite.

Ryou

A parasite. Always questioning Reiko Tamura.

Gotou

Gotou is an "experimental" Parasite created by Reiko. He is actually composed of several combined Parasites, whose shapeshifting ability has advanced to the point where they can sw

A

Mr. A is a Parasite who considers Shinichi a threat. Reiko calls him a fool while Migi describes him as "not one of our smart ones." Mr. A has no capacity for subtlety or

Takeshi Hirokawa

Hirokawa is the leader of a cabal of Parasites which counts Reiko and Goto among its members. The group attempts to accrue political power in order to set up safehouses where they

Mamoru Uda

Uda is, like Shinichi, a human who had a Parasite merge with a part of his body other than his brain. In Uda's case, the Parasite lodged in the lower part of his head. Uda's Parasi

Dr. Ogata

The scientist that first studies a parasite corpse.

Taro

A student who works part time at a detective agency.

Sanae

Student that discovers Shimada Hideo is a parasite.