Katrielle Layton is a pretty solid detective. She may not be much of a fighter but she can certainly move fast and is quick at making snap decisions. Caillou was never really good at that kind of thing and would be getting outmaneuvered the entire time. He really doesn’t stand a chance against Katrielle Layton and would need to get some kind of edgy CW series where he’s all grown up to compete. It’s not unheard of for this to happen but I’m going to assume that it just won’t. Katrielle Layton wins.