Rudy Gillen  

A criminologist who was one of Tenma's classmates helped him evade arrest and obtained information about Johan from other criminals that he had encountered. Additionally, this individual aided Nina in recalling her past memories, even at the expense of their own safety. Despite having gained some understanding of Johan's motivations and methods, Rudy remains perplexed by his actions. Dr. Gillen is another former student of Dr. Reichwein and was first introduced in Chapter 33 of the story.