Megumi Fujiwara is a second-year student at Kubiki High School and is widely regarded as one of the three most beautiful girls at the school. She has pink hair and pink eyes, stands about 160 centimeters tall, and presents an appearance that many find striking. This outward beauty, however, contrasts sharply with her inner nature. Megumi is defined by a deeply selfish, arrogant, and volatile personality. She openly states that dying for her is a man's happiness and carries herself with an unshakable belief in her own superiority. Her behavior is impulsive and often violent. She has been known to bring weapons to school for the purpose of harassing specific students, an act she refers to as glasses-kun hunting, and she reacts explosively whenever she does not get her way. Her selfishness is not tempered by loyalty; although she has a boyfriend named Masamune Matsumoto, she frequently goes on dates with other boys, actions that leave those who pursue her with bruised egos or physical injuries. She revels in causing chaos and seems to derive satisfaction from exerting power over others, appearing to enjoy the turmoil her actions create.

Megumi is the central figure of the story and the primary catalyst for the chaotic events that unfold. Her everyday life is a series of incidents driven by her unchecked whims, whether she is tormenting classmates, provoking confrontations, or juggling multiple romantic interests. She maintains a complex web of relationships with a wide cast of eccentric individuals. Her relationship with Masamune Matsumoto is the most consistent in her life, though it is marked more by mutual vanity than genuine affection. She also interacts closely with her cousins and classmates, Arashi and Izumi Hashiba, and shares a fraught dynamic with other students such as Emika, who frequently ends up in physical confrontations with her. Despite the mayhem she causes, she often manages to avoid serious consequences, either through quick escapes or by leveraging her status and looks.

In terms of abilities, Megumi is notably physically aggressive and appears to have no hesitation in using force to achieve her aims. She is capable of harming others without remorse and can intimidate those around her through sheer force of will. Her most defining quality, however, is her complete lack of self-restraint and her unwavering commitment to her own pleasure and convenience. Over the course of the series, Megumi undergoes little personal growth, as the story operates on a status quo where her selfish and volatile behavior remains a constant source of comedy and conflict. Her character serves as the engine for the series' signature blend of romance, violence, and absurd humor.