Miss Nagisa teaches Ken Izumi's class at his school. In one documented incident, she becomes antagonistic after being brainwashed by the Juralian aliens. Under their control, she leads her students on a field trip to an Undersea City intending to kill them. This hostile action stems solely from alien manipulation. Ken Izumi intervenes and thwarts the plot, preventing the students' deaths. Information about her background, character development, or appearances beyond this specific episode is not provided.