Mr. Nadira had been experimenting on canine neurology. As a result of his experiments, he developed the dog collar, which can be used to control hellhounds. However, he is secretly working for Kronos.
When encountered in Sector 3, he initially hides his intentions, explaining the purpose of the dog collar. However, he deceives the player, whose weapons he has confiscated, sending the hellhounds to attack. The player is forced to use the dog collar to defeat the canines.