When Yuri was still a kid, he was a nice guy who liked to laugh even if there was nothing to laugh about. When he grows older, he does not like to talk and acts very cold but could be very friendly once he becomes friends with someone. The communication problem is mainly caused by his shyness and self-contained personality. After his parents death, his communication problem got worse. With the combination of various problems, he barely talks to anyone, especially as a teenager. However, his shy personality doesn't ruin his strategy and technique when it comes to battle.