Reiko Tamura

Reiko Tamura is one of the main antagonists of the anime/manga series Parasyte. She is a Parasite who took over the body of Ryoko Tamiya, a teacher at Shinichi Izumi's school. Early in the series, she becomes pregnant with a human child after mating with Mr. A. Although it was only an experiment at the time, she eventually grows to genuinely care for the child. Notably, this makes her one of two notable Parasites to develop human emotions, the other, of course, being Migi.

She is voiced by Atsuko Tanaka in the Japanese version of the anime and Joanne Bonasso in the English version, the former of whom also voices Harumi Kiyama and Lady Medea.

Appearance
In Reiko's first appearance, she had shoulder length light purple hair and sharp brown eyes. She had an average height and a slim build. With her second appearance, her body type remained the same, but her skin became more fair. She now had long black hair and a more pointed face. She was often seen wearing formal attire and lip stick.

Personality
Reiko was a highly intelligent parasite, as she often studied the human psyche in hopes of understanding their species better. She was initially just as cruel as her fellow parasites. After giving birth and raising her child, she began developing and showing human emotions, such as laughter and love towards her son. She sacrificed her own body to keep her son safe, as the police shot a barrage of bullets at her. Before succumbing from her wounds, she revealed that she truly believed humans and parasites to be the same.

History
After the Parasite took over Ryōko Tamiya's body, the Parasite took the name "Reiko Tamura". Reiko has scientific inclinations, and is driven to discover the biology, origin, and purpose of Parasites. Reiko discovers—by becoming impregnated by another Parasite named Mr. A—that a pregnant Parasite will bear a normal, human child, and that Parasites have no apparent means of reproduction.

Reiko kills Ryoko's mother who learns that daughter quit her job but she discovered she is not Ryoko used be

Reiko is more logical and reasonable than many other Parasites, and allows Shinichi to live unmolested largely because she finds him an interesting anomaly worthy of study.

She eventually gives birth to Mr. A's baby; after betraying her fellow Parasites and killing quite a few of them, the police brutally kill her. The baby survives because of her decision not to fight back against the police. Her own sacrifice restores Shinichi's humanity, making him shed tears.