Summary
Eiai Nano is a first-year student at Ohananomitsu High School and an alumnus of Mirei Middle School. She serves as the fourth girlfriend of Aijou Rentarou. Defined by her pursuit of practicality and efficiency, Nano disregards what she considers useless emotions in herself and others, often appearing cold or uncaring to those around her. She holds the title of the smartest girl in her cohort, achieving a perfect score of 700 out of 700 on her school exams. Her intellect is so profound that it surpasses the genius-level characters found in other series. Nano has memorized hundreds of digits of Pi, a skill she occasionally uses to calm herself. This extreme intelligence allows her to be the first to devise solutions in difficult situations, though her lack of social experience can lead to brutal outcomes. She acts as a walking encyclopedia, possessing vast amounts of information. Despite her mental sharpness, Nano suffers from acrophobia, or a fear of heights. She is also skilled in hand-to-hand combat and the use of melee weapons, with a particular proficiency in boxcutters. Her name contains several puns: Eiai can be read as A.I., referencing Artificial Intelligence, while Nano alludes to nanotechnology, fitting her personality. Additionally, her birthday on March 14th references the mathematical constant pi (3.14).
