Shizuka, Ichijou

一条静

A doctor who washed ashore alongside the main characters.
She is intelligent and composed, maintaining a constant smile on her face.
She is the first to detect the virus infecting the heroines and suggests that the heroes rape them as a vaccine to temporarily suppress the infection; she also engages in intercourse with the hero while developing a cure in the abandoned facilities.
While developing the cure, she instructs the hero in various techniques to ensure the regular collection of his semen.
She is the only ally on the island who holds no animosity toward the protagonist.