Lilia was an alien. By saying she was 30 years old, it means 30 earth years old. Her years are 6 months so on her world she is 60. But
that's not old for her kind, since their years are twice as fast, they live twice as long. People live to about 100 so they live to around 200,
since years are 6 months technically they live the same amount of time as a human.
Her kind wants to learn more about humans so they sent her and a few others to live among humans and learn about them. They
developed a serum that could make them look human for 24 hours, after that they need to drink more to stay human or revert back to
their true form. They really look lizard-like and glow with a kind of "beautiful energy" as they call it, the brighter this glow the more
beautiful you are considered on their world.
One issue was Lilia began to make friends with humans, even got a human boyfriend. She made herself a successful human life. She
became attached, which was not part of the plan. She kept the serum well hidden. Lila was really her name and it sounded human
enough to pass. She wants to stay human but knows she can't, not permanently. In 2 more earth years the mother ship will come and
take them back and she might get in trouble for being mixed up with humans. Still she tells no one for risk of being "studied", not even
her boyfriend.