Surprise may make some lose grip of what they're holding - Megatron merely tightened his grip on the airbrush, pistons and cables tightening with readiness as he snapped his helm up.

Though even as he did so he knew who it was, Orion not having to call his name for the familiarity of his footsteps to register, or his shape outlined by the door and the lights.

"... Orion." Despite the surprise, the smile was automatic even as he cocked his helm, airbrush still held more like a weapon than the tool it was. "I didn't expect you here on a day like this."

It was a question, even if it wasn't phrased like one, though he beckoned Orion closer with his other hand even as he spoke.