Alternatively, it could be pretty much anything, other than Voldemort or Harry. Might be fribbles, although of course he's a drosser and beside he's only level one in witchery craftery so I don't think he'd be a powerful enough adversary. etc.
Foot High Male - the target readership - dwarven in stature and masculine in gender.
Anyone taller would be able to reach the REAL porn on the top shelves.
I'll get me coat...