Shinjiro later does the same thing to a boss Hulk Hogan Shadow ... by impaling it with a spike of rock.
Roy's decision to put the whole October Fourth subplot into an early grave. Between figuring out something was wrong, deciding to stop it anyway, calling Mitsuru out when she asks him who gave him the right to do so, hitting Ken with a broken table to keep him from stabbing Shinjiro with a concealed steak knife, and later explaining why the whole idea of revenge was stupid to Ken's face. That has got to take some serious balls.
Ken in the battle against both the Hanged Man Shadow (by managing to impale a mook shadow int the face with his spear and using said weapon as a lightning rod) AND Shadow Roy. The boy's tactics are quickly becoming TOO SUBTLE FOR... well, for pretty much anyone.