Parasite Monster

Parasite Monster are parasites that takes control of a person's mind.

Overview
Parasite Monsters are created by the Doctor. They are developed to reside inside the host’s brain, allowing them to collect the host’s memory data and analyze them, and have a really strong control on the host's mind. The Parasite Monsters are programmed to make their hosts become loyal to The Professor.

Those who are under control

 * Serena
 * Rin
 * Ruri Kurosaki