Kinoko Komori, the U.A. High School Class 1-B student training as a Pro Hero under the name Shemage, bears a surname meaning "small forest" and a given name homophonous with "mushroom"—reflecting her Quirk—while its kanji signify "hope," "of," and "child." She possesses a short, thin frame standing 152 cm tall, featuring honey-brown hair cut in a distinctive mushroom-bob that curves inward below her shoulders. Her long bangs typically obscure her face, partially concealing large, wide cat-like eyes with warm brown irises and cross-sliced shiitake cap-shaped pupils, alongside a notably large mouth. Her hero costume includes a fly agaric-patterned red-and-white turtleneck dress, a mushroom cap hat, pale pink patterned knee-high boots, and a dark brown belt holding Shroom-Shooter spray bottles; it later adds a fluffy collar during the Final War, and evolves eight years post-graduation to feature stripes and a witch's hat-like pointed hat. Initially shy during the U.A. Sports Festival, often hiding sullenly behind her bangs, Komori grows more confident, demonstrated by her enthusiastic Quirk deployment and teamwork in the Joint Training Battle. She exhibits passionate mushroom knowledge, reciting scientific names and adding affectionate honorifics when summoning them, frequently employing mushroom puns in combat. Despite her battle fervor, she shows kindness, apologizing to Fumikage Tokoyami for overusing her Quirk and advising his care. She also expresses admiration for the Pro Hero Hawks, seeking personal photos. Her Mushroom Quirk emits spores from her body that rapidly grow into full-sized mushrooms upon contacting solid surfaces, lasting 2–3 hours and flourishing in humidity amplified by her Shroom-Shooter spray bottles. Strategically controlling diverse species, she cultivates invasive fungi like *Schizophyllum commune* in opponents' airways—her Splitgill Lung Strike technique—inducing choking or asphyxiation to immobilize. Though not physically combative, her high Quirk proficiency makes her a formidable support fighter, capable of blanketing large areas for obscuration or area denial, aiding allies like Shihai Kuroiro in stealth operations and requiring preventative antifungal spray for teammates. During the Paranormal Liberation Front raid, she deployed large-scale sedatives against Gigantomachia. Academically strong in makeup artistry, showcased in Class 1-B's festival play, her Ultra Analysis stats rate Power and Speed low (1/6 E), Technique high (5/6 A), Wits average (3/6 C), and Idol Appeal notable (4/6 B), aligning with her aspiration to become an Idol Hero merging performance and heroism. She undertook work studies with Shihai Kuroiro, applying her skills in critical missions. Eight years after graduating U.A., she achieved her Pro Hero goal, operating in an updated costume. Her discarded original hero name, "Gnocchi Nyokonyoko," was replaced by "Shemage"—evoking shimeji mushrooms and a "female mage" aesthetic.