Japanese Lovers

Koichi Shido

Voiced by: Kisho Taniyama (Japanese), Illich Guardiola (English)

Koichi Shido (紫藤 浩一 Shidō Kōichi) is the main antagonist of the series and the teacher of Class 3A. Rei Miyamoto is afraid and is disgusted by him and Saeko Busujima says his name with a scowl, hinting that he apparently is a sadistic and villainous character. This is affirmed when he leaves behind a student who sprained his ankle and even kicks him back towards a group of pursuing zombies, saying there is no point in keeping weaklings alive.
After Rei and Takashi leave, Shido appoints himself leader of the group on the bus, winning the approval of the other students. Saya and Saeko comment that Shido's actions are like that of a recruiter for a religious cult. Shido permits the main cast to leave the bus except for Shizuka, but Kohta expresses his disapproval of Shido's actions and grazes Shido's face with a nail gun shot, stating that Shido used to allow bullies to beat Kohta up as he watched with glee.
Shido reappears when he is talking with a spy at the Takagi estate. He then watches over an orgy among his followers. He finds this behavior acceptable during the group's "free time". Shido declares his followers angels that will help usher in a new age, but when one of the boys disagrees and shows concern for his own family, Shido convinces his followers to eject the "weak link" for the sake of the New World, and they callously throw the teen off the bus and leave him to be eaten by "them".
Shido was the son of Ichiro Shido, a politician. In the manga, his mother died, but he went into the teaching profession at Tokonosu where his father was a director. But his father had an illegitimate son, and he was ordered to work in the family business with his half-brother; one of the shady dealings involved stopping Rei’s father from investigating the Shido family’s funding, and so he arranged that Rei was to be held back a year. When Rei threatens to kill Shido with her bayonet, Shido dares her to do it, but she cannot, saying he is not worth the trouble. Saya's dad orders him and his student followers to leave, and he complies, but a high-altitude nuclear explosion causes both the bus and nearby forklift with a concrete barrier to stall and they collide. He recovers consciousness in time to see the undead horde advancing through the gap in the barrier.
Shido's back is seen as he prepares to enter Shintoko Third Elementary School.

Rika Minami

Voiced by: Junko Takeuchi (Japanese), Melissa Davis (English)

Rika Minami (南 リカ Minami Rika) is the chief of first squadron in the prefecture police and an expert sniper (5th in the country) in the Special Assault Team, who, along with the Special Security Team, were sent to clear the nearby airport of any zombie stragglers and to rescue any survivors. She is friends with Shizuka, and let her house-sit while she is on assignment. On one of her missions, she helped her partner sacrifice himself by using jet fuel in a tanker to immolate the zombies. She manages to get in contact with Shizuka, who informs her that they "stayed over and borrowed her weapons and things," before the communication is cut by an EMP surge. She was last seen leaving to go to the city, presumably for her friend Shizuka.

 source wikipedia