Kazuma Narusawa is considered as information broker of the group and the computer genius.
Personality
Kazuma is easily discourage in the live action. When he was stopped by Nanami with a simple elemental device, he gave up and didn't continue his pursuit.
He also believes in occult.As shown in Episode 1 of the Live-action he used a Norse Mythology spell in order to contact the ghost of the murdered victim.
Abilities
Just like the other four students, Kazuma has good deduction skills and would often give hints to the other students by giving them riddles. He is also a good programmer and hacker as shown in the different episodes of the live action
Relationships
Kazuma doesn't have a friendly relationship with Ryu. He felt bitter when Ryu was able to solve the locked room murder case And when he learned about the Pluto (Meiosei) he was also one of the members of the class who doubted Ryu's innocence and he was also convinced that he was the murderer.