Rudy-Ulrich Gillen

Rudy-Ulrich Gillen is a criminologist and former classmate of Tenma who becomes an important ally in investigating Johan. He helps save Tenma from arrest, gathers information from criminals connected to Johan and risks his own safety while helping Nina recover her past. Though Gillen gains insight into Johan's methods, Johan's actions continue to puzzle him. Gillen was also a student of Dr. Reichwein.