No need to break out the winds - breaking out the mundane flapping is enough to rattle him. Literally, the skeleton wolf rattles a little as the harpy steps forward, with his bones shivering and knocking each other.

Feeling trapped between wanting to leave and wanting to fight back, his ears twist back and flatten in the scruff around his neck. He's frightened. Every time he's tried to make himself larger and more threatening - to establish he's too big to swoop at and chew on - the harpy's gotten even bigger even faster. And there's nowhere more for Papyrus to escalate, he doesn't have wings to flap or a pack to support him. He's alone.

Papyrus lets out a whining snarl, loud enough to cover the sound of shivering bones, and gathers his courage for a compromise. No prey-like retreat, no dangerously foolish lunge - he steps to the side, circling at almost a fixed distance, very slowly putting space between them.

Is the harpy going to let this happen? It sounds... calm, not too threatened. Have they... fought before? There's something familiar about this winged creature that he can't put his finger on. (He can't even find the idiom, let alone a finger.)