Kinoko Komori, operating under the hero name Shemage, attends U.A. High School as a member of Class 1-B and hails from Gunma Prefecture. She first appears at age 15, standing 152 cm tall with a slender build, honey-brown hair styled in a mushroom-shaped bob, and a fringe typically obscuring her eyes. When visible, her pupils display a distinctive shiitake mushroom pattern. Her fungal-themed hero costume features a fly agaric design with a mushroom cap hat, turtleneck dress, and knee-high boots. Initially shy and reserved during the U.A. Sports Festival, where she placed 34th in the obstacle race and joined the cavalry battle, Komori gradually develops confidence. By the Joint Training Battle, she demonstrates enthusiastic application of her Quirk. She exhibits deep affinity for mushrooms, frequently using mushroom-related puns and sharing detailed mycological knowledge. Her playful nature coexists with kindness, exemplified when apologizing to Fumikage Tokoyami after her Quirk affected him and urging medical treatment. Her Mushroom Quirk releases spores that rapidly grow diverse fungi on solid surfaces—including organic matter—persisting 2–3 hours and proliferating best in humidity. She amplifies spore dispersal via Shroom-Shooter spray bottles that increase moisture. Her Ultimate Move, Splitgill Lung Strike, grows Schizophyllum commune fungi in opponents' respiratory tracts to induce asphyxiation, which incapacitated Tokoyami during joint training. Quirk limitations include moisture dependency, accidental ally contamination, vulnerability to antifungal agents, and minimal combat proficiency beyond fungal manipulation. During the Joint Training Battle, Komori immobilized Toru Hagakure with fungi and executed the Splitgill Lung Strike against Tokoyami to secure victory. She later participated in the Paranormal Liberation War at Gunga Mountain Villa alongside Pro Heroes and classmates. In the Final War Arc, she collaborated with heroes like Fumikage Tokoyami and Denki Kaminari against adversaries including Dabi and Gigantomachia, deploying area-wide fungal dispersion to impede movements. Eight years post-graduation, Komori becomes a licensed Pro Hero. Her updated costume adopts a striped pattern and witch hat design. She maintains a relationship with classmate Shihai Kuroiro, appearing together publicly after graduation. Her career aligns with her "Idol Hero" aspiration, blending heroism with performance. Additional aspects include her makeup artistry showcased in Class 1-B's school festival play. Her hero name "Shemage" merges "shimeji" mushroom and "female mage," reflecting her costume's witch aesthetic, while "Gnocchi Nyokonyoko" was rejected for difficult pronunciation. She prefers mushroom-based cuisine and Gothic Lolita fashion. U.A. assessment stats note low physical power/speed, high technique, and moderate idol potential.