Narumi is the homeroom teacher of Mikan's class. He teaches Japanese and often deals with Natsume when he gets in trouble or tries to break out. He has the human inclination pheromone Alice, which suits his personality. He is also the moderating teacher of the Somatic types. The author revealed in the character bio that Narumi is indeed a central character, and his past are yet to be discovered. Narumi gave Mikan a star when Sumire became good friends with her and because of her bravery during being trapped in a warehouse (with Sumire and Natsume).
Even though he is a bit negligent as a teacher he loves his students and wants to protect them. In both the manga and anime Narumi allows Mikan to call him "Dad" which is ironic because Mikan is the daughter of his unrequited love Yuka Azumi.
Alice: Human Inclination Pheromone Alice Stone Color: Magenta Type of Alice: Somatic Occupation: Teacher
Personality
Narumi appears to be a humorous and cheerful teacher, though he is annoying to some people like Misaki-sensei and Natsume. Nar from his name actually means Narcissistic, which he is undeniably. He cares a lot about his students, especially Mikan. He also worries for Natsume and believes that Mikan is the key to the Academy. He likes to steal bean whips from his friend's greenhouse and he's often scolded because of that. He also comes up with the weirdest ideas for plays and he just enjoys dressing up.
However, in the past, after Yuka left the academy, Narumi became cold and indifferent. Even though he saw Sakurano and Subaru getting punished by Jinno, he doesn't do anything to help them despite Yuka telling him to protect them. He was also very arrogant as a student
Alice
Narumi has the human inclination pheromone Alice. His Alice can make other(and older) people, regardless of gender, do what he wants, but once he uses his Alice on children who are inexperienced with love, they will pass out.
Because Narumi has such strong pheromones, he uses the prevention earrings and ring to control his Alice. He has no girlfriend, but the ring is placed on the ring finger