Kafuka Fuura, a female student in Class 2-F, radiates an extraordinarily optimistic worldview, habitually reimagining dark scenarios through absurdly positive lenses. She interprets a suicide attempt by hanging as someone "practicing self-stretching to grow taller," exemplifying her defiance of grim realities. Her appearance mirrors her buoyant demeanor: short black hair frames her face, accented by a hairpin clipped to one bang, while her expressions remain perpetually cheerful.

Adopting the pen name "Kafuka Fuura"—a nod to Franz Kafka’s brooding themes—she ironically embodies relentless sunshine. Flashbacks and school records hint at a possible real identity: "An Akagi," though unconfirmed. Her past intertwines with turmoil: a father prone to suicidal theatrics and a mother overtaken by demonic forces. Yet Kafuka confronts this fractured lineage with unwavering cheer.

She engages peers by bestowing mischievous nicknames, often vexing their recipients, and fervently champions belief in extraterrestrials, specifically the Porororoka species. This conviction culminates in constructing a makeshift UFO landing strip. The narrative later unveils her pre-story death, her organs donated to classmates. Through sheer willpower and optimism, she lingers by inhabiting a central female character in each scene, maintaining her presence in Class 2-F’s chaotic orbit.

Her dynamic with Nozomu Itoshiki, their despair-steeped teacher, underscores their ideological clash: her relentless positivity counterbalances his existential gloom, shaping the class’s unconventional interactions.