Originally this was a standard helper robot that Seina Yamada was issued when he enrolled in the G.P. Academy. However Kiriko and Erma not trusting Amane Kaunaq with Seina added a video camera for surveillance. However a short circuit caused by Amanes modifications had altered the personality of the robot. Basically NBs still the helper robot it was originally designed for but now it has the personality of a voyeuristic pervert. NB is almost never found without its camera hoping to catch girls in various stages of undress. However the girls do catch it the end result is NB getting dented. The name quotNBquot is a reference to Nabeshin Shinichi Watanabes character in Excel Saga and Puni Puni Poemi. source: Wikipedia minor edits by Elwin Blaine Coldiron