Reever Wenhamm

In charge of the Science department of the Black Order, therefore he is technically the "boss" of the science department, but still carries out Komui's orders (though he does protest). He is Australian, and 26 years old. He is a rather comical character, being the main helper of Komui, and is often distressed over the fact that he works under such a weird man. His character was included in the game Jump Superstars. His name was translated to Riba in volumes one and two of the English manga. Reever dislikes tobacco and alcohol, instead drinking various soft drinks; he specializes in mathematics, physics and language.

(Source: Wikipedia)