An AI robot born from the efforts of Miku and Teto, possessing human emotions. Built with high-end specs, she is extremely powerful and has self-regeneration abilities that allow her to recover from anything but fatal wounds. She carries a bat and can take down a zombie in a single swing. Initially, she felt a sense of revulsion toward killing zombies, but now her desire to protect Miku and Teto has grown stronger, and she follows orders faithfully. She is brave and strong.

An AI robot born from the efforts of Miku and Teto, possessing human emotions. Built with high-end specs, she is extremely powerful and possesses exceptional vision and information-gathering capabilities. She carries a gun and can take down a target with a single shot. She also has a shotgun but rarely uses it. Initially, she felt revulsion toward killing zombies, but now her desire to protect Miku and Teto has taken priority, and she follows orders. She is kind-hearted, soft-spoken, and often struggles to make decisions.

One of the creators of Teto and Miku SV2, she is highly intelligent. Possessing a brave and resilient personality, she prioritizes reality over emotion. She is calculating and always considers the best possible outcome. She has feelings for Miku.

One of the creators of Teto and Miku SV2, she is very smart. She is emotional and easily frightened. When faced with a terrifying situation, she tends to panic. She is soft-hearted and tries to help others easily. She is often seen leaning on Teto and has feelings for her.

Beings infected by the virus, they are stronger than humans and suffer from an intense hunger. They attempt to attack humans, and their bodies gradually decay over time.