Touma Kamijo is a high school student in Academy City, officially designated a Level 0 esper lacking significant psychic abilities. His defining trait is the power residing in his right hand, "Imagine Breaker," which negates all supernatural phenomena—magic, esper powers, divine blessings—upon contact. This negation extends to his own fortune, causing extreme misfortune he voices with his lamented catchphrase, "Such misfortune!". Born to Touya and Shiina Kamijo, his childhood involved persecution due to misfortunes blamed on Imagine Breaker. Superstitious people held him responsible for their hardships, culminating in an attempted stabbing. A television station exploited this incident, broadcasting his image without consent and labeling him the "god of pestilence." To shield him, his father enrolled him in Academy City after kindergarten, believing its scientific environment would counter superstition. Unbeknownst to them, Academy City's founder, Aleister Crowley, orchestrated this to study Imagine Breaker. The ability's influence inadvertently spawned Kazakiri Hyouka, an entity born from the collective unconscious fear of his power. Physically, Touma appears ordinary except for his signature spiky black hair, styled with hair gel. He typically wears his Academy City uniform with an orange T-shirt underneath, an appearance others sometimes mistake for delinquency due to its disheveled nature and his frequent involvement in conflicts. He opts for casual clothing on non-school days. Touma's personality centers on an unwavering commitment to help others, declaring, "I don’t need a reason to save someone." This instinct persists even after he loses all pre-Academy City memories during an incident rescuing Index, a nun from a magical curse. He hides this amnesia to avoid worrying those close to him, carefully navigating interactions to maintain the facade. His selflessness extends to former enemies seeking redemption. However, he shows no leniency toward antagonists harming innocents, regardless of gender, as seen in confrontations with figures like Sherry Cromwell or Vento of the Front. Imagine Breaker shapes his daily life. Classmates value him as a "misfortune sponge," absorbing their bad luck—such as celebrating his forgotten homework easing academic pressure. Conversely, male peers resent his unintentional appeal to females, dubbed "Kami-yan disease" by his friend Tsuchimikado Motoharu. Numerous girls, including Index, Misaka Mikoto, and Shokuhou Misaki, develop affections for him due to his protective nature. His relationship with Mikoto began when he intervened during her harassment by thugs, unaware of her abilities. With Misaki, he prevented her memory-erasure attempt during a depressive episode and later shielded her from attackers, resulting in unique amnesia where new memories of her fade rapidly. Despite these connections, he remains romantically unattached, occasionally expressing preference for "elder sister" types like Kanzaki Kaori. Imagine Breaker's dynamics evolve significantly. When severed during conflict, his arm temporarily manifests "Dragon Strike"—a draconic entity feared by adversaries like Fiamma of the Right. The arm regenerates afterward, restoring Imagine Breaker. Touma initially dismisses the ability as purely defensive but gradually uncovers its ties to larger conspiracies. After recurring manipulation by factions like GREMLIN, he becomes distrustful of others’ motives. His lowest point arrives in the "Omega World," a fabricated reality where he contemplates suicide before resolving to dismantle the illusion and confront its creator, Magic God Othinus. Post-conflict, he accepts his role in shouldering misfortune to protect others. Academically, Touma struggles due to his Level 0 status, requiring remedial classes. However, he demonstrates sharp problem-solving in combat, leveraging physics knowledge for tactical advantages. Colleagues like Lessar note his intelligence in specific contexts despite academic shortcomings. Etymological interpretations of his name reflect his abilities: "Kamijou" homophones include "神浄討魔" ("The One Who Purifies God and Slays Demons") and "神上" ("La Persona Superiore a Dio"). "Touma" (透魔) translates to "Invisible Demon," referencing Imagine Breaker’s hidden draconic force.