Eiai Nano, or Nano for short, is a stunning student with silver hair and crimson eyes. She's always dressed in a pale black uniform with a turquoise necktie, skirt, and leggings. As a highly intelligent and efficient individual, Nano is obsessed with solving problems in the most practical way possible. She's calculative and focused, always prioritizing her studies and disregarding potential drawbacks. However, when she realized she had feelings for someone, Nano's usual focus began to waver. She panicked and struggled to concentrate, finding herself constantly writing out the number pi to regain her composure. As the top student at school, Nano believes that fun times are a waste and that successful students like herself should always be studying. She's polite but concise, hoping to resolve any distractions so she can get back to her business.