Kafuka Fuura is a main character in the anime and manga series Sayonara Zetsubou Sensei. She is a highly optimistic and eccentric student in Nozomu Itoshiki's class, known for her habit of viewing everything in an excessively positive light, often to absurd extremes. Her cheerfulness and bizarre worldview provide a sharp contrast to the protagonist's pessimism, making her a central figure in the series' dark humor and satirical themes. Kafuka's mysterious background adds further intrigue to her character.