Whoever hit him obviously didn't do a good enough job. His face didn't collapse into itself. Also he looks like he might be a haemophiliac what with all the blood. Perhaps its coming out of his brain? He looks a little dazed. Never actually played Persona very much and this character doesn't have a wiki-page.
Abyssal_Bleakness said: So what your saying is that it might take more than one hit with the ball-peen hammer to collapse his face into his head?
...not exactly what I meant, but considering the kind of punishment enemies can dole out, and how much of that he can survive, yes, he probably could tank a few hammer strokes.