Ayumi, one of Ichijou's younger sisters, remains just as enigmatic. She is the third child in the Ichijou family and seems too young to communicate verbally, so she uses drawing on a sketchpad to express herself. Ayumi is also aware of the aliens monitoring Becky, making her one of the few who knows this secret besides Ichijou.
In episode 7, Ayumi plays a significant role when she visits the school and stirs up some issues. Following this episode, she becomes a regular presence, notably in episode 15. Additionally, she is responsible for bringing a disease from the alien spaceship that impacts the class in episode 19.
