Miyako Uehara is a student in Class 1-C at Momotsuki High School and is frequently referred to by her classmates as a bookworm or study bug, a label she strongly dislikes. She is defined by her relentless dedication to studying, yet despite her constant efforts, her academic performance remains frustratingly average, a source of ongoing irritation for her. She is often surrounded by piles of books and is frequently seen studying, wearing a pair of red glasses for comfort during long hours, though she also uses contact lenses. Among her class, she possesses the most realistic and grounded attitude, often becoming visibly angry when the chaotic and absurd antics of her peers prevent her from concentrating on her schoolwork. She frequently yells at her classmates to take their lessons seriously or to stop bothering her, and she tries to maintain a level head even in strenuous situations, though her willpower is not always sufficient to keep her composure. Despite her desire to study in peace, she is unwillingly dragged into many of the series' bizarre events, such as being handcuffed to another student in order to track down a missing character. A notable running gag involves her forehead, which becomes progressively larger and shinier as the series progresses, to the point where characters can see their reflections in it or are forced to wear welding masks to look at her. She also possesses what appears to be extrasensory perception, referred to as ESP, which manifests in extreme situations. She has studied abroad at some point, which has earned her the additional nickname of the Leader. Her key relationships are with her fellow students in Class 1-C, including the eccentric teacher Rebecca Miyamoto, as well as classmates such as Sayaka Suzuki and Ichijou, with whom she frequently interacts in exasperated circumstances. Her development is tied to her ongoing struggle to find a moment of quiet study amid the surreal and chaotic environment of her classroom, and she consistently acts as the most sensible member of the group. Her notable abilities include her dedicated study habits, her extrasensory perception, and the curious reflective property of her forehead.