Exorcist, First Class, as well as a lecturer at the University of the True Cross, who holds the title of Meister as a Summoner, The Doctor and Aria. He wears a patch over his left eye after he joined the Blue Night of Satan into his body and fired his eye. Is tattooed on the arms and magic circles Meister Aria. After the attack of Satan upon him and his family chump great hatred for all the demons, especially those closely associated with Satan. Ironically, it is very loyal to Mephisto (who is the son of Satan), he is ready to fulfill his every command, so even though it knows the identity of Rin, stopped their attacks on him. In episode 20 Yukio says that the message of the Order of the Southern Cross was written "in the native language," Igor - this language was Polish. Really loved his wife, Michelle.