Nanami Jinnai is the younger sister of Katsuhiko Jinnai and a fellow student at Shinonome High School. She is characterized by her strong independence and entrepreneurial drive, often taking on part-time jobs and even accepting payment from the Broadcast Club to expose her brother’s fraudulent election campaign. When she is transported to the world of El‑Hazard, she initially finds herself alone and must work as a waitress to earn enough money to travel. She later establishes a small business selling boxed lunches to visiting priestesses, demonstrating her resourcefulness and practical nature. Nanami harbors a quiet romantic crush on Makoto Mizuhara, though she rarely has the opportunity to express her feelings openly, and this unspoken affection leads to a playful rivalry with Shayla‑Shayla. She maintains a tense but not entirely hostile relationship with her brother; she does not condone his schemes and often undermines him, but sibling rivalry remains a constant undercurrent. In the course of her adventures, she becomes close friends with Princess Rune Venus. Nanami’s special ability, granted when she entered El‑Hazard, is the power to see through the illusions of the Phantom Tribe, making her an invaluable ally against their deceptions. She uses this ability casually and instinctively, often revealing hidden threats without realizing the full significance of what she sees. Over the course of the story, she grows more confident in her own skills, balancing her down‑to‑earth outlook with the strange circumstances she encounters.