The moment his strike made contact, Vol could tell something was wrong.  Why did he not hear the cracking of bone as his strength battered ribs, why did the mammal girl not collapse from the pain?  His eyes narrowed.  He should have been able to guess from her clothes: the ones who tried to fight him clad in bright colors had proven trickier than their fellow mammals, some possessing minor magic.  Either that white suit of hers was a form of disguised armor, or she was simply tougher than the others.  The thought pleased him.  His brief conflicts here had barely been enough of a challenge to get his blood running, but perhaps this one could actually take a few strikes before falling.

The shapeshifter's reptilian form did in fact have genitalia, though they were different from those of humans.  These were covered by a tight-fitting pair of shorts made out of the lizard's own shed scales, which made it appear as if it wore nothing at all and was simply sexless.  A blow there would certainly have hurt, if delivered with enough force, but Vol had not been caught completely off his guard.

The girl's resilience had been unexpected, but the moment she took to regain her balance gave him time enough to reconcile this.  Vol was not one to stand around sputtering at a simple surprise, not after having lived so long and seen so many strange things before.  Though he did not immediately follow up his initial blow, when the counterattack came, he was ready for it.

He didn't know exactly where she was aiming at, but he could hazard a guess.  The sheer height of his current form made it difficult for smaller creatures to target his head and shoulders, and because of this they tended to aim for his knees, stomach, or groin.  Those were actually somewhat difficult to defend with his powerful arms, but his [i]legs[/i], on the other hand...

An advantage in height also translated into an advantage in reach, and Vol made full use of this as his prey came running towards him.  He leaned back slightly as his right leg came whipping forwards, his knee moving up and to the left before his lower leg snapped outwards, kicking hard at the girl's side.  Unlike his previous swiping blow, Vol put some effort into this one, knowing that more force would be necessary to hurt the girl.  If all went well, he'd knock her aside with his kick before she got a chance to land whatever attack she was making, and break her with the impact of his full strength.