According to Eriko, her brother (the late Akio), who was a late Devil Z owner, died in an accident. She then tried to "warn" the other people. Unable to understand her motives, Tatsuya Shima drives his Black Bird to chase Eriko. After that Eriko says that she did this often. She once tried to steal the Devil Z just to dump it into the waters of Yokohama but was stopped by Shima's Black Bird. She then moved to London, England to attend college.