Emi Fukukado, the Smile Hero Ms. Joke, works as a Pro Hero and homeroom teacher for Class 2-2 at Ketsubutsu Academy High School. She has an athletic build, sea-green hair usually covered by an orange bandana, and dark green eyes. Her most recognizable trait is a constant, broad smile. Her hero costume features a sleeveless navy blue shirt with a high collar, puffed shorts with green and orange stripes, a corset decorated with smiley-face pins, a white V-shaped belt, padded yellow gloves with golden knuckle plates, thick metal wrist guards, and sometimes a white respirator mask displaying smiley-face symbols. Her personality is persistently cheerful, outgoing, and humorous. She delights in playful teasing, particularly targeting Shota Aizawa with repeated jokes proposing marriage and a shared domestic life full of laughter. Despite her comedic demeanor, she demonstrates serious dedication to her students' development and voices criticism of U.A. High School's perceived elitism, specifically objecting to placing Hitoshi Shinso in General Studies despite his useful Quirk. Her Quirk, Outburst, compels uncontrollable laughter in people near her, temporarily impairing cognition and coordination. This allows her to efficiently subdue opponents, often following up with physical takedowns using her hand-to-hand combat skills. She employs specialized gear like a "laugh mask" to neutralize her Quirk's effects in public. Her background includes running a hero agency near Shota Aizawa's during her early career, leading to frequent villain-fighting collaborations where she developed a one-sided romantic rapport with him. She later became a teacher at Ketsubutsu Academy, fostering a rivalry between her students and U.A. High's. Her chronological story involvement starts with observing the U.A. Sports Festival, where she commented on Hitoshi Shinso's potential. At the Provisional Hero License Exam, she greeted Aizawa and Class 1-A enthusiastically, introduced her own students, observed the exam while bantering with Aizawa, and questioned his teaching methods when he admitted not warning U.A. students about being targeted. Both her and Aizawa's students largely passed the exam's rescue portion, prompting her suggestion of future joint training. She participated in the large-scale raid on the Paranormal Liberation Front's Gunga Mountain Villa base. Later, during the Final War, she worked with Hound Dog and her Ketsubutsu students to apprehend the villain Skeptic after La Brava exposed his location, preventing him from sabotaging U.A. High's systems, and assisted in his transport following arrest.