Brian Imada is a fictional character. I can't even remember in which book I read about him. But I saw a guy recently and thought to myself, "Wow, he looks just like Brian Imada!" And then I spent several minutes trying to remember who Brian was and how I knew him.
Do you ever do that — meet real people and mistake them for fictional ones? I think of this as being a sort of Level 2 play in the game of "Which famous actor would you cast to play that character in the movie?"