Kaede Otori, a high school student at Itan Private High School, drifts through life with an effortlessly relaxed and airheaded charm. Her long dark green hair flows into a low ponytail secured by a bow, accented by four hair ties and a playful ahoge that crowns her head. Gentle, perpetually smiling eyes and a soft-spoken, unhurried way of speaking accentuate her innocent aura. Hailing from a wealthy family, she navigates the labyrinthine halls of her sprawling mansion home, often losing her way—a trait inherited from her mother, who once embarked on a week-long excursion to a neighbor’s house, communicating through cryptic notes. Kaede advances from first-year class 1 to third-year class 4, her academic journey as steady as her meandering focus. Cultural festival preparations spark her friendship with Shouko Komi and Nene Onemine. Drawn to Shouko’s quiet interactions, Kaede expresses a yearning to connect, revealing her observant side beneath the distractibility. This event cements her bond with Nene, whom she affectionately calls "big sister." Their dynamic sees Nene guiding her through crowded spaces, clasping her hand during a New York school trip to curb her spontaneous wanderings. Kaede’s world unfolds at a languid pace. She acquires a chainsaw in a library, naps in garbage cans, and loses hours mesmerized by looping fireplace videos. Yet her serene kindness bridges gaps, aligning with Shouko’s quiet communication and winning the trust of Nene’s younger brothers, who dub her "Kaede big sister." Though she consistently underperforms in athletic tests, ballet-trained flexibility remains her forte. Her academic and social paths stay unchanging, mirroring her static character growth. Debuting in manga pajamas and ranking seventh in popularity polls, she shares the whimsical "Tail Duo" title with Nene, nodding to her surname’s meaning. Notable moments—festival teamwork, travel mishaps, and glimpses of her eccentric family—spotlight her airheaded quirks as enduring comedic pillars, untouched by narrative evolution.