Tsukuyomi Komoe, a homeroom teacher at an Academy City high school, defies expectations with her childlike appearance—standing at 135 cm with vivid pink hair and eyes—often mistaken for a preteen due to her youthful attire and speech patterns punctuated by "desu." This facade contrasts starkly with her adult habits: her apartment brims with scattered beer cans, cigarette packs, and dense academic texts on neuropsychology and chemistry, underscoring her chain-smoking, heavy-drinking persona. Speculation by figures like Accelerator and Last Order hints at ties to clandestine experiments halting cellular aging, potentially explaining her agelessness and cementing her status among Academy City’s enigmatic "seven wonders." A polymath educator, she specializes in chemistry, pyrokinesis, and the Power Curriculum Program, leveraging unorthodox methods like blindfolded poker as disciplinary tools to engage students in esper development and Personal Reality principles. Her apartment frequently doubles as a sanctuary for displaced students, including Himegami Aisa, Musujime Awaki, Kamijou Touma, and Index, whom she shelters during crises. Despite lacking supernatural abilities, she assists Index in executing a complex magical healing ritual, showcasing her adaptability. Pragmatic yet inventive, she navigates the city in a custom-modified car tailored to her stature and later pilots an Acro Bike through perilous missions, aiding allies in high-stakes scenarios. Beneath her playful demeanor lies a fiercely protective mentor. She openly admires Touma’s rebellious streak yet upholds professional boundaries, chastising unexplained absences while remaining oblivious to Academy City’s hidden magical wars. During the Daihasei Festival, her impassioned defense of students galvanizes their resolve to triumph. Subtle traits round her persona: an uncanny ability to track time unaided, a penchant for pink hues reflected in her wardrobe and vehicle, and the juxtaposition of juvenile quirks against adult vices. These elements coalesce into a figure balancing whimsical irony with earnest guidance, her duality anchoring both comedic moments and genuine mentorship within the narrative’s tapestry.