Probably that would hit the news, if it happened on Earth. 

"...Where are you from, again?"

"Far away, I said. I'm not sure you'd recognize the city's name."

...Blegh.

To Alita: <I'm thinking of just point blank asking her if she's from another planet. That alone won't reveal too much...>

<Yeah, I think that's worth the risk.>

<Okay.>

To Lyli: "Are you from Earth?"

"...I'm from Coruscant. Which, if you're calling this planet 'Earth' instead of something recognized in the wider galaxy, I'm guessing this planet is uncontacted."

"...Uh."

<Alita, does 'Coruscant' ring a bell?>

<No. It's definitely not one of the Empire's worlds. Not even a language I recognize.>

To Lyli: "So... We know of a couple worlds, but Coruscant isn't one of them."

"Huh. An entire uncontacted corner of the galaxy, then."

"By you guys, at least." 

<How much should I tell her about the Empire and - everything?>

<I think we should tell her everything. Even if she decides to run away, that denies the Vissers her abilities, and that's worth it already.>

<You might be better at answering questions than I am?>

<Fair enough.>

Alita takes back her hold on the body.

"Have you heard of Yeerks? Or Andalites?"

She thinks for a moment - there's a lot of planets in her Empire and around the edges, after all, with even more languages between them. They don't ring a bell, though. "Not by those names," she says. "Though I might recognize a description."

"Andalites are blue or purple, quadrupedal, four-eyed, herbivorous, and have bladed tails. They have a technology that allows them to touch another creature and, thereafter, be able to turn into it for a time. Yeerks are greenish, aquatic, photosynthetic, small enough to fit in, um, my palm here...they're without limbs or eyes, and can act outside the water only by wrapping around another creature's brain and sharing or controlling its body.

I—the person talking to you right now—am a Yeerk. There are other Yeerks on this planet in secret. They are dangerous. I realize this probably sounds unbelievable if you haven't encountered my kind before; I can at least demonstrate my existence by leaving my host and reentering."

"Neither sounds familiar."

"And - I believe you, but I'd like to speak to Anna without you influencing her."

"I understand. Let me get a glass of water to wait in."

She starts walking toward the sink.

"What I'm about to do is super illegal under Yeerk law. Warning you about the presence of Yeerks on this planet was, itself, super illegal under Yeerk law. I've forfeited my life."

She reaches the sink and pours herself a glass of water.

"But...you spontaneously appeared in front of me. You look human and speak English, despite being from such a far corner of the galaxy that you haven't heard the word 'Andalite'. This suggests there are capabilities at play unknown to the Yeerk government—to Visser Three, the current Yeerk commander on this planet—and if anything is worth the risk to my life it's denying those capabilities to him."

She holds the glass of water up to her ear—Anna's ear—and crawls out.