Kasumi Ibara White shirt with a red tie. 26 years old. Former office worker. Short brown hair. Currently, thanks to her natural talent, she continues to slaughter zombies using weapons given to her by Mizuka, a researcher she travels with. She has a cool, downer personality and always keeps her composure. She is searching for her older sister, Teruna.

Haruhi Suzuzono White shirt with a red tie. 24 years old. Former office worker. Black hair in a ponytail. Currently traveling with Kasumi and Mizuka. She adores Kasumi and they were often together since their days as employees. She is determined to fight for the sake of Kasumi, who was her mentor and senior. She assists Kasumi with a rifle given to her by Mizuka. She has a serious and skeptical personality. She is the intellectual type with a sharp mind.

Makina Ito Black hoodie and a miniskirt. 11 years old. Former orphan. Black hair in twin tails. Before she knew it, her orphanage was gone and the world was in ruins. She never cared much for the world and didn't think the apocalypse was so bad, but she felt true terror upon encountering a zombie. However, she gripped a combat knife she found and now fights to survive and enjoy this world. She acts like a cool tsundere, but she secretly wants to be pampered. She has a cousin named Ellis whom she has never met.

Ellis Campbell Ito White hoodie. Blonde hair in twin tails. 19 years old. Former college student. Her parents were killed by zombies right before her eyes. Driven to the brink by shock and confusion, she grabbed a sword displayed in her house and began decapitating zombies with a crazed laugh. Now, she wanders in search of her cousin Makina, whom she learned about from her parents' diary. Usually cheerful, she becomes a total doting sister-type around Makina. In battle, she turns into a maniac, tearing through enemies in a berserk frenzy.

Mizuka Hashimoto Short black hair, round glasses. Lab coat. 21 years old. Researcher. She had suggested the possibility of a zombie virus long ago, but due to her own perceived inadequacy, she allowed it to be released. Now, as atonement, she provides weapons, food, and facilities to many people. She travels with Kasumi and Haruhi and is grateful that they understand her. She is a bit of a klutz.

Teruna Ibara Short black hair. Black and red newsboy cap, black shirt, and a long coat. 28 years old. Zombie Slayer. Cool and intimidating personality. She dispatches zombies quickly and surely with her custom-made large red katana. She wants to reunite with Kasumi. She is the strongest zombie slayer on earth.