There's something so weird over there.  - And then a bit closer to them, quite suddenly!  And then also more gradually.

Well that's presumably a sensor malfunction but it pays to be cautious and skirt around it. They'll get a better look that way and won't need to worry about running into anything unexpected head on.

It's tracking them.  Every few minutes it blips closer than its base speed allows.

Well that is less likely to be a sensor malfunction! Not zero likely, they are really quite crappy sensors, but still. He calls a halt and has the ship's docking and maneuvering lights turned on to make their position clear and hopefully avoid any collisions with the unknown and erratic vessel.

It's very small for a vessel, if their sensors are to be believed.  But then that would explain why they can't see it even as it gets quite close.

"Continue to hold position and sweep the surroundings with the maneuvering lights until visual contact is established."

"Aye Captain."

There it is!  It circles around and comes to a stop just in front of the ship.

That's definitely way too small to be a ship. It almost looks... humanoid...

The lights sweep forward to center on the anomaly.

There it yet remains!  Until it - doesn't -

That was definitely person shaped.

"Telemetry, where did the anomaly go."

"I... don't know Captain."

There's a quite-unpleasant chirp of sensory static that everyone on the bridge experiences in the pitch and the feel of the air.  Not coming from any particular direction.

"Captain," the same telemetry officer says in a strained voice, gaze fixed on a point behind Lucien. 

"Wha-" Lucien turns to look.

The anomaly is standing there, having struck a balletic third position.  It:

• is around seven feet tall, and yes, humanoid
• wears a mask of black lace, fashioned after a skull
• has hair that is somewhat smaller but not much less dramatic in the ship's gravity
• is covered in as many metallic trinkets as can rest within the bounds of taste
• wears a burgundy, historical-looking dress with the front of the skirt left open to display a pair of pants and high boots
• statics them again, a little more gently and a fair bit more sustainted.

"Greetings, this is the USS Keystone of the United Earth. If you would be so kind as to identify yourself and state your purpose for visiting our vessel."

There's a third building-up of static, which this time lasts long enough to sublimate into music.  It's cautious, trilling and fluttering, and lasts only about the length of a verse.

The tune - isn't memorable, once it stops.

"Lieutenant Singh, do you uh. Have any idea if that was language at all."

"Not yet, sir."

More music!  It almost sounds like it could be about being someone or wanting something, if music that wasn't even music could possibly convey that.

"I'm guessing the you don't need me for translating that,"

"Not yet anyways,"

Lucien address the... being.

"You want something?"

This not-a-song is about... agreement..... and something... else....... and maybe the concept of 'hello'?

"Uh. Hello. I'm not sure I got that middle part."

Confusionmusic.  Also there's a light breeze blowing in the bridge.

"I don't suppose that breeze is coming from anywhere?"

"No sir."

"Ah, well."