Kusano (草野, lit. Kusano) was one of the parasites responsible for the deaths of Kuramori's wife and their daughter. He suspected that Reiko Tamura was a traitor and, along with Maesawa and Hikawa, tried to kill her.Appearance
He had short black hair, with an average height and build.
He was seen wearing gray dress pants along with a black pinstriped vest and a gray long-sleeved shirt.
In the manga, he appears to have a small scar above his left eye.
Personality
He is reactionary and aggressive against perceived threats, advocating for Shinichi Izumi to be killed and trusting his instinct that Reiko was no longer an ally due to her decisions. He is disloyal even for a parasite, willing to kill parasite allies if it meant getting rid of Reiko and keeping his plans secret from the higher-up members of their group. It's noted that he later begins showing impressive signs of expressing anger.
He appears to help lead the parasite group, managing a laptop in a meeting in the anime and holding onto files involving Shinichi in the manga. He also persuaded two other parasites to assist him in destroying Reiko.
Reiko later comments that he is similar to A, and that his plans had little creativity.
