Ayame Kajō is the female protagonist of the series and a second-year student at Tokioka Academy, where she publicly holds the position of student council vice president. Behind this reserved and rule-abiding facade, she leads a secret double life as the founder and leader of the underground resistance group known as SOX, operating under the alias Blue Snow. Her motivation stems from a deeply personal place, as her biological father, a former politician named Masashi Endo, was imprisoned for supposedly immoral acts. Convinced of his innocence and raised in an environment that valued freedom of expression, Ayame inherited from him a modified cell phone capable of disabling the monitoring functions of the government-controlled Peace Maker devices for three minutes each day.

In public settings, particularly within the student council, Ayame presents herself as cold, stern, and unexpressive, wearing her hair in braids and glasses to maintain the image of a model student. This carefully constructed exterior hides a personality that is utterly obsessed with sexual humor and raunchy jokes. The moment she activates her phone’s jamming function or dons her Blue Snow disguise a simple white sheet and a pair of panties on her head she unleashes a torrent of creative obscenities and double entendres. Her ultimate goal is to dismantle the oppressive censorship laws that have robbed society of laughter and basic sexual knowledge, believing that the freedom to experience sexuality and humor is a fundamental human right.

Despite her fiery rhetoric and encyclopedic knowledge of forbidden erotic literature and techniques, Ayame displays a notable contradiction in her character. She is almost entirely inexperienced when it comes to real-life romantic or sexual situations. She often panics, screams, or reacts violently when confronted with genuine nudity or intimacy, revealing an innocent and almost naive side that contrasts sharply with her terrorist persona. This gap between theory and practice defines her role as a teenager fighting against a repressive system, rather than a truly promiscuous individual. Her passion for the cause is genuine, and she draws a clear line between liberation and depravity, actively opposing anyone who uses their freedom as an excuse for genuine sexual harassment or predation.

Ayame serves as the primary instigator of the plot, recruiting the reluctant Tanukichi Okuma into SOX through a combination of blackmail and shared ideals. While she relies heavily on Tanukichi as her most trusted ally and emotional support, their relationship remains largely platonic, built on mutual respect for the mission rather than romance. Her most complex relationship is with Anna Nishikinomiya, the student council president. While they begin as close friends, their dynamic becomes strained and adversarial once Anna discovers Ayame’s secret identity as the terrorist Blue Snow. She also shares a rivalry with the eccentric inventor Hyouka Fuwa, with whom she occasionally collaborates despite their differing visions of sexuality.

As a leader and tactician, Ayame is incredibly resourceful and brave. Using her father’s modified phone, she orchestrates elaborate public stunts designed to provoke the authorities and awaken the repressed desires of the populace. Her abilities include crafting makeshift erotic gadgets from contraband books, delivering inspiring speeches that frame sex as a beautiful and natural act, and utilizing clever misdirection to evade capture. Throughout the story, she begins to mature slightly, learning to trust her comrades more and acknowledging the dangers of her own extreme ideology, though she never wavers in her core mission to bring dirty jokes back to the world.