Iwanaga and Nancy Drew are both detectives but it’s safe to say that Iwanaga usually deals with the more dangerous cases. She is more agile as well and having a robotic leg certainly doesn’t hurt when trying to land a solid blow. If Drew had more formal hand to hand training then she could make this one close but as it stands I don’t see her winning in this battle of detectives. Iwanaga is too formidable. Iwanaga wins.