Nagi is an invisible man, meaning that he has the ability to turn invisible whenever he wants. He does it involuntarily whenever he gets embarrassed or sad. He has fluffy black and white hair, and a formal suit that he wears to school, as well as black and white eyes. He's incredibly shy and nervous, but is kind and sweet with others, willing to protect his friends. Despite his social anxiety, he doesn't stutter. He's mostly interested in history, and spends his free time in the school library.