I like Jennifer Lawrence because in all her interactions with the media she is exactly who she is, no pretenses. She has shown us her action chops via Hunger Games and X-Men and I think she would make an excellent mercenary.
I loved Asa Butterfield in Ender's Game, one of my favorite books and Ender is an all time favorite character of mine too and he did not disappoint. From what I can tell he is grounded and an all around nice person which is Matt.
I am currently seeking suggestions for Lysandra's twin brother Brendan and their older brother Robert.
Next time: Esben/Edward Drake
I need a role for Chris Pratt too. Hmm....