A high school senior and president of the school's kendo club, she is extremely skilled at close combat with a bokken. Calm and collected with a sense of pride in her skills, Saeko is among the most reliable of the group. Everyone can count on her combat skills to pull them through a crisis. Also throughout the journey, she begins to develop romantic feelings for Takashi. Not much is known about her family except for her father who had traveled abroad on a self-defense conference before the advent of the Outbreak. Saya's father, Souichirou Takagi, tells Saeko that her father once gave him guidance so to repay the favor, he gives her a very powerful sword, crafted in the Tokyo armory by General Murata during the Meiji Era.

A young, beautiful 26 year old woman who teaches mathematics and also acts as the homeroom teacher for class 3-2. She lives with her sister and niece in an apartment block quite close to Jin-Ho's. Her father’s unexpected departure from her life when she was young has had a huge impact on her. Even though she is extremely attractive and was apparently popular throughout her school life, she has become very guarded around men, feeling unable to trust or form relationships with them. Consequently she is still a virgin and even has her first kiss during the course of the story. She also seems to be following her mother's career path, who was also a teacher and became the district superintendent before retirement. She also has a crush or love for Myung, Jin-Ho a student in her class and is defenseless around him.

Saizo's childhood friend and as well one of the Sanada's 10 warriors.
A beautiful Russian girl and female member of the Iga ninja, she uses ice magic and is capable of freezing water and mist in an instant, thus earning her the name "Anastasia the Frozen Flower." She targeted Yukimura but was defeated, so she decided to join him. Both Saizo and Sasuke call her 'Ana'.
She is very playful and cunning in nature, but also becomes serious when the moment calls for it.