Cinder by Marissa Meyer. A 16-year-old female, that it has mechanisms, it takes place in New Beijing, the Blue Fever starts which is a disease that has no cure.
Smiling through locked teeth, Cinder gestured at the prince. “Iko, please pay your respects to our customer.” She lowered her voice. “His Imperial Highness.”
Iko craned her head, aiming the round sensor up at the prince, who towered more than three feet above her. The light flared as her scanner recognized him. “Prince Kai,” she said, her metallic voice squeaking. “You are even more handsome in person.”
Cinder’s stomach twisted in embarrassment, even as the prince laughed.
“That’s enough, Iko. Get in the booth.
“You don’t see a personality like that every day,” said Prince Kai, leaning against the booth’s door frame as if he brought androids to the market all the time. “Did you program her yourself?” (p. 2)
Prince Kai wanted to say that there is different personality and you can’t see them everyday in the same place.