I liked all the characters, the relationships are really interesting and I have to say it: Dragons!
The world she is living in is a dangerous one and she is no killer. So she doubts herself. So she breaks sometimes a little.
I really liked their developing relationship and I wanted them to develop one.
I really like Lena, the way she stands up to her father, helps her mother but doesn’t lose herself in it.
Because of the whole relationship drama the actual earth is in danger theme wasn’t really that present. Sadly.