"As gills could probably be comfortably hidden behind long hair or a fashionable neck scarf I might prefer them," Hank said, just a touch grumpy on that subject. His feet hurt, now more than ever since he'd been properly flexing them as he galavanted about the rooftops at night. Still, he gave the doctor a shy smile and a helpless shrug immediately after his pout. "I'm not sure I qualify as human, either. But I trusted my superiors. Or rather, I trusted that they were too used to taking credit for my successes to actively investigate me."
When Amy described being turned into an alien fish person, or very nearly an alien fish person, he readjusted his glasses and then leaned in, peering. "Stars and garters, Amy, but that sounds just like a vampire to me... Well. Not that it was fish or alien, but the prospect of being turned into another sort of creature altogether by a bite to the neck... that's the traditional stories I've always read. I'm happy they failed though."
The offer of a tour made him grin, though he looked at the Doctor. "If you wouldn't mind, sir? I would love to see the internal structure of the vessel."