The individual was born in Japan before moving on to study in London. They possess a talent for deduction and aspire to become a detective. Time sensitivity is also something they are very particular about. Their watch has the capability of reading milliseconds. When apprehending criminals, this person asks them "Why did you commit the crime?"
Recently, they returned to Japan where they encountered their greatest challenge - Kaito Kid. They believe that Kaito Kuroba is actually KID and require evidence to prove it. In movie 10, they assisted Conan and Heiji in their investigation but later vanished after being separated from them by attackers.