For a moment, Steve thinks that he's done something to upset the dragon. It makes a grumbling sound, steps away from him, and bears its teeth, so there's a split-second where Steve's worried he'll get snapped at and then have to run to the clinic with some kind of injury (or scorch wound? can it breathe fire?). Which would be awful, because then he'd have to hide from his friends even more than he already has been.

But nothing happens. The dragon only retracts its teeth to show a set of pink gums, and Steve imagines that this is supposed to mean something.

Well, he'd asked a question. This may be the answer. Steve tilts his head to the side and thinks it over. "Uh... okay. Retractor? Gummy? No-Teeth?"

Those all sound like horrible names.