Dr. Yoshinaga

Dr. Yoshinaga (ヨシナガ博士, Yoshinaga hakase) is a doctor who is researching the Gibiate disease and a vaccine for it. He collects venomous stingers of Gibia, with the help of Sensui and Kenroku.

Appearance
Yoshinaga is a young adult with long blue hair and glasses. He usually wears a light blue shirt with dark blue pants and a white coat.

Plot
Kathleen Funada takes Sensui Kanzaki and Kenroku Sanada to Yoshinaga and explains they time traveled from Edo. Yoshinaga believes them, commenting that if Gibia exist, why wouldn't time travel too. He then explains what Gibia is and how the monsters spread using the venom to sting people.

As the lights in the camp go out and Gibia start to attack, Yoshinaga tells Kathleen to go to her mother and asks Kenroku to come with him to the defense team. Yoshinaga comes up with the plan to burn the tents in hope to generate enough light and chase away the Gibia. He is impressed by Sensui's sword skills while killing Gibia and Kenroku's quick learning of western tools as he uses the grenades.