How Could Such a Cute Girl Possibly Be a Monster?

After a spaceship crash, Rinone finds a little girl and raises her.

The girl is very strange. At first, she can only babble like a baby, but later she displays an astonishing ability to learn.

The first thing she says is "Mama" to Rinone.

...Xue Li, why do I feel like there's something off about this little one?

What's strange about her? It's not like she's a monster or anything.

Watching the little one happily dance along to the music, it's impossible to believe that.

How could she possibly be a monster?