After the tragedy that killed his mother, he changed, becoming cold, calculated, cunning, and discreet, Willing to do whatever means necessary to see his goals of finding his father through. His psychological trauma from Ai's murder tends to resurface anytime he seems to forget his goals. This is the case when Kana Arima suggested that he'd look back at his happy memories in Chapter 50 to improve his acting on the spot. It is a case of Post-Traumatic Stress Disorder and doubles as an active remi