Ryotaro Dojima is the lead detective in Persona 4 (2008), the police officer stationed in the rural town of Inaba whose deadpan dedication became a fan favorite. Lines like this one, where Dojima proudly calls himself the ace detective, circulate widely on meme soundboards as reaction audio for mystery and deduction memes. The quote pairs naturally with the running joke that the perp is probably in Inaba, and Persona edits, VTuber clips and anime compilations still drop it whenever a case gets cracked.